Painless Performance 60502 User manual

P/N 60502 & 60505
1994/1995 GM LT1 FUEL INJECTION
WIRE HARNESS INSTALLATION
INSTRUCTIONS
Manual P/N 90517
Copyright © May 2002
PAINLESS PERFORMANCE PRODUCTS
2501 Ludelle Street - Fort Worth, Texas 76105-1036 - [phone]
E-Mail: [email protected] Web: [e-mail]

We have attempted to provide you with as accurate instructions
as possible, and are always concerned about corrections or
improvements that can be made. If you have found any errors or
omissions, or if you simply have comments or suggestions
concerning these instructions, please write us at the address on
the cover and let us know about them. Or, better yet, send us a
fax at [phone] or e-mail us at
[email protected]. We sincerely appreciate
your business.
Perfect Performance Products, LLC shall in no event be liable in contract or tort (including
negligence) for special, indirect, incidental, or consequential damages, such as but not limited to,
loss of property damage, or any other damages, costs or expenses which might be claimed as the
result of the use or failure of the goods sold hereby, except only the cost of repair or
replacement.
P/N 90517 Painless Wiring Manual
March 16, 2005
Copyright 1994 by Perfect Performance Products, LLC

TABLE OF CONTENTS
1.0 INTRODUCTION.......................................................................................................................... ii
2.0 ABOUT THESE INSTRUCTIONS............................................................................................... ii
3.0 TOOLS NEEDED.......................................................................................................................... 1
4.0 PRE-INSTALLATION AND HARNESS ROUTING GUIDELINES........................................... 1
4.1 TRANSMISSION FUNCTION...................................................................................... 1
4.2 GET TO KNOW THE ENGINE THAT YOU ARE USING........................................... 2
5.0 GENERAL INSTALLATION INSTRUCTIONS.......................................................................... 3
5.1 GROUNDING THE VEHICLE....................................................................................... 3
5.2 ROUGH INSTALLATION............................................................................................... 4
5.3 HARNESS ATTACHMENT........................................................................................... 4
5.4 TERMINAL INSTALLATION INSTRUCTIONS.......................................................... 4
6.0 GM 94 & 95 LT1 SYSTEM WIRE HARNESS INSTALLATION............................................... 5
6.1 CONTENTS OF THE 60502 OR 60505 WIRE HARNESS KIT..................................... 5
6.2 SPECIFIC CIRCUIT CONNECTIONS........................................................................... 5
6.3 ENGINE GROUP INSTALLATION............................................................................... 9
6.4 TAIL SECTION INSTALLATION................................................................................. 13
7.0 TROUBLE-SHOOTING INSTRUCTIONS................................................................................... 13
7.1 THE "CHECK ENGINE" LIGHT................................................................................... 14
7.2 RETRIEVING TROUBLE CODES FROM THE COMPUTER..................................... 14
7.3 WHEN TO CALL "PAINLESS WIRING" TECH LINE................................................ 16
LIST OF FIGURES
Figure 6.1 Diagnostic Link Connector (DLC) & Check Engine Light ............................................. 5
Figure 6.2 Brake Switch Connection ............................................................................................... 6
Figure 6.3 Brake Switch Relay......................................................................................................... 7
Figure 6.4 Gear Indicator Switch ..................................................................................................... 7
Figure 6.5 Air Pump Relay Connector ............................................................................................. 8
Figure 6.6 Canister Purge Solenoid ................................................................................................. 8
Figure 6.7 Air Pump Connection ..................................................................................................... 9
Figure 6.8 Fuel Pump Relay Connector............................................................................................ 9
Figure 6.9 EGR Solenoid ................................................................................................................. 10
Figure 6.10 Knock Sensor .................................................................................................................. 10
Figure 6.11 Oxygen Sensor ................................................................................................................ 11
Figure 6.12 MAP Sensor .................................................................................................................... 11
Figure 6.13 Injectors 1, 3, 5, 7............................................................................................................. 11
Figure 6.14 Injectors 2, 4, 6, 8 ............................................................................................................ 11
Figure 6.15 TPS Sensor ...................................................................................................................... 11
Figure 6.16 IAC................................................................................................................................... 11
Figure 6.17 MAF Sensor .................................................................................................................... 12
Figure 6.18 Distributor Connection..................................................................................................... 12
Figure 6.19 Ignition Module................................................................................................................ 12
Figure 6.20 Coil................................................................................................................................... 12
Figure 6.21 ECT Sensor....................................................................................................................... 12
Figure 6.22 IAT Sensor........................................................................................................................ 12
Figure 6.23 VSS.................................................................................................................................... 13
Figure 6.24 Transmission Connection ................................................................................... .............. 13
Figure 7.1 Fuse Identification.............................................................................................................. 14
i

LIST OF TABLES
Table 4.1 Compatible Parts.............................................................................................................. 3
Table 6.1 Dash Section Connections................................................................................................ 8
Table 6.2 Engine Section Connections............................................................................................. 10
Table 6.3 Tail Section Connections.................................................................................................. 13
Table 7.1 Diagnostic Trouble Codes................................................................................................ 14 & 15
1.0 INTRODUCTION
You have purchased what we at Painless Performance Products believe to be the most up-to-date and easiest-to-
install automotive fuel injection harness on the market. It is designed for easy installation, even if you have no
electrical experience.
This harness is designed to be a complete wiring system for the fuel injection system on General Motors 1994 and
newer LT1 injected engines and to control the 4L60E transmission. This includes all wiring that is needed by the
computer to run and control the injection system and transmission. A module has been included to bypass the vehicle
anti theft system (VATS) incorporated in the computer. When using this harness on a '96 or '97 engine you must
replace the coil, coil output wire and knock sensor with the parts from a '92 - '95 engine.
NOTE: The use of a 40 pulse Vehicle Speed Sensor, such as the one that comes
standard in the 4L60E transmission, is required when using a 1994 or newer
computer for operation of emission devices. The use of any other style transmission,
such as a 350 or 400 Turbo, which cannot operate a 40-pulse sensor, will require the
use of an earlier style computer. The use of a 4L60E will also require the use of an
electronic speedometer because of the absence of a cable drive in the transmission.
Usually, the computer, relays and fuse block can easily be mounted under the dash. Most of the wiring in the harness
has been pre-terminated to the proper connector and all wire has been GM color-coded. All wiring is TXL, 600 volt,
and 125 degree centigrade with cross-link insulation.
This fuel injection system harness have been divided into three major groups:
ENGINE GROUP Includes wiring for the fuel injectors, distributor, and sensors.
DASH GROUP Includes ignition feed wires, assembly line diagnostic link (DLC) connector,
check engine light, computer wiring and connectors, brake switch wiring, gear
shift indicator wiring, tachometer wiring, air pump, canister purge, VATS and
fuse block.
TAIL GROUP Include VSS wiring, transmission wiring (if applicable) and power wire for fuel
pump.
2.0 ABOUT THESE INSTRUCTIONS
These instructions provide information for the installation of the 60502 LT1 (94 & 95) Fuel Injection Harness Kit.
The contents of these instructions are divided into major Sections, as follows:
1.0 INTRODUCTION
2.0 ABOUT THESE INSTRUCTIONS
3.0 TOOLS NEEDED
4.0 PRE-INSTALLATION AND HARNESS ROUTING GUIDELINES
5.0 GENERAL INSTALLATION INSTRUCTIONS
6.0 60502 LT1 (94 & 95) FUEL INJECTION HARNESS KIT
8.0 TROUBLE-SHOOTING INSTRUCTIONS AND TROUBLE CODES
Sections are further divided into Paragraphs and Steps. Throughout, the Figure numbers refer to illustration and
the Table numbers refer to information in table form. These are located in or near the sections or paragraphs to
which they correspond. Always pay careful attention to any notes or any text labeled CAUTION.
ii

3.0 TOOLS NEEDED
In addition to your regular tools, you will need, at least, the following:
Crimping tool NOTE: USE A QUALITY TOOL TO AVOID OVER-CRIMPING.
Wire stripper
Continuity tester CAUTION: DO NOT USE A TEST LIGHT TO TEST THE COMPUTER OR SENSOR
WIRING OR YOU WILL DAMAGE THE COMPUTER.
Electric drill
1 5/8" Hole saw (for the rubber grommet in the firewall)
4.0 PRE-INSTALLATION AND HARNESS ROUTING GUIDELINES
The installation of your harness kit will consist of two parts:
~ The physical routing, positioning, and securing of the harness, wire groups, and individual wires and
connectors.
~ The proper electrical connection of the individual circuits.
We cannot tell you how to route the harness in your automobile. That depends a great deal upon the particular make
of the automobile and what extent you want to secure and conceal the harness. We do offer some general guidelines
and routing practices starting in Paragraph 5.3, general installation instructions in Section 5.0, and precise
instruction concerning the electrical connections you will have to make beginning in Section 6.0. To help you begin
thinking through the installation of your wire harness, read the following sections:
4.1 TRANSMISSION FUNCTION
If you are not using the 4L60E transmission, read Paragraph 4.1.1, then skip to Paragraph 4.1.3. If you ARE
going to use 4L60E, then skip Paragraph 4.1.1, and start at paragraph 4.1.2.
4.1.1 If you ARE NOT using a 4L60E transmission, tape off and store the light blue/black and pink
(brake switch) wires in the dash group and the 13-position (transmission) round connector in the
tail section.
4.1.2 If you ARE going to use a 4L60E transmission then you MUST have a two-position vehicle speed
sensor (VSS), and the correct brake switch. These are necessary to make the transmission work
correctly. The brake switch should be closed (electrically connected) when the brakes ARE NOT
being applied and open (not electrically connected) when the brakes ARE being applied. This is
the opposite of a standard brake light switch. If you are using a pressure brake switch, a SPDT
relay must be installed to unlock the converter when the brakes are applied. The vehicle speed
sensor lets the computer know how fast the wheels are turning.
4.1.3 Regardless of whether you use the 4L60E or not, the vehicle speed sensor (VSS) and park/neutral
indicator switch must be used and is needed by the computer so it can command the emissions
control devices on the engine. This part is necessary if you want your car to be street-legal.
NOTE; Emission devices
This harness has provisions for 3 emission devices, which are EGR solenoid, Air Pump relay and a
Canister Purge solenoid. We have rolled up the canister purge solenoid wiring and air pump
wiring in the dash section and may be left there if these items are not to be used. If you
plan on using the canister purge solenoid and air pump you will need to route these wires
out to the engine compartment and install an air pump relay. Secure the wires to the main
harness using the tie wraps supplied.
1

To keep the check engine light from coming on you will need to plug in a canister purge
solenoid and air pump relay to the wires in the dash section. (The computer looks for
signals from these controls and does not care if the actual devices are installed.)
4.2 YOU SHOULD GET TO KNOW THE PARTICULAR ENGINE YOU ARE
USING:
NOTE: The 94 & 95 LT1 engine has two oxygen sensors, one on the right side and one on the left side
of the engine. This system has four rectangular connectors at the computer. A 16188051
computer is required for proper operation.
4.2.1 PPPI recommends the use of the following parts. See Table 4.1. These will meet all requirements
and are compatible with PPPI harnesses. The numbers given are GM and AC Delco part numbers.
You must use the computer listed on table 4.1 with our harness.
4.2.2 Familiarize yourself with the harness by locating each of the harness groups and by looking at the
connectors on the wire ends.
4.2.3 Decide where and how the computer, fuse block and relays will be mounted. PPPI wire harness
kits are designed to mount either under the dash or in the kick panel on the right side. They must
be no further apart than the wiring will allow (approx. 16 inches).
4.2.4 A good exercise is to lay out the wire harness on the floor beside your vehicle and identify all the
connectors and wires.
4.2.5 You will want to route the harness through and around open areas. Inside edges provide extra
protection from hazards and also provide places for tie wraps, clips and other support.
4.2.6 Route the harness away from sharp edges, exhaust pipes, and the hood, trunk and door hinges.
4.2.7 Plan where harness supports will be located. Use a support approximately every 6 inches unless
the harness routes under the floor carpet.
4.2.8 Allow enough slack in the harness at places where movement could possibly occur (body to frame,
frame to engine, etc.).
4.2.9 The wires should be bundled into harness groups. Use tape, nylon ties or poly split loom.
2

Table 4-1 Compatible Parts
5.0 GENERAL INSTALLATION INSTRUCTIONS
CAUTION:
~ DO NOT DISCONNECT THE BATTERY OR THE COMPUTER CONNECTORS WHILE THE
IGNITION IS ON.
~ DO NOT SHORT ANY WIRES IN THIS HARNESS TO GROUND (WITH THE EXCEPTION OF
LABELED GROUND WIRES) OR DAMAGE TO THE COMPUTER WILL RESULT.
~ GIVING OR RECEIVING A "JUMP START" MAY DAMAGE THE COMPUTER.
~ DO NOT USE A TEST LIGHT WHEN TESTING COMPUTER SENSORS OR COMPUTER
CIRCUITS. DAMAGE TO THE COMPUTER WILL RESULT!
~ WHEN ROUTING THE WIRES FOR THE VEHICLE SPEED SENSOR (IF USED) MAKE
CERTAIN THAT THEY ARE AT LEAST 12 INCHES AWAY FROM ANY IGNITION WIRING
(SPARK PLUG WIRES, ETC.).
Notes:
~ There is a normal, small current drain on these fuel injected systems.
~ Each connector in this harness is different and will not fit in the wrong place. NEVER FORCE ANY
CONNECTOR.
~ When connecting the plugs to the computer USE EXTREME CARE to make sure none of the pins in
the computer are or become bent.
~ The fuel pump you are using MUST be rated at a minimum of 45 PSI (pounds per square inch).
5.1 GROUNDING THE VEHICLE
A perfectly and beautifully wired automobile will nevertheless have problems if everything is not properly grounded.
Don't go to the effort to installing a quality wire harness only to neglect proper grounding.
Note: The installer of this harness is responsible for all ground wires not provided with this part.
5.1.1 Connect a ground strap or cable (minimum of a 4 Ga. wire) from the negative battery terminal to
the chassis (frame).
5.1.2 Connect a ground strap (minimum of a 4 Ga. wire) from the engine to the chassis (frame). DO
NOT RELY UPON THE MOTOR MOUNTS TO MAKE THIS CONNECTION.
5.1.3 Connect a ground strap from the engine to the body.
3
LT1 Fuel Injection Harness (94 & 95) Part # 60502 or 60505
Main Computer............................Service#16188051 EGR. Solenoid................................ Delco# 214-396
Brake Switch.....................................GM# 25524845 Gear Indicator Switch..................GM# 15705308 or
Intake Air Temperature.....................GM# 12110319 Delco #D2286A
Ignition Module.............................Delco# D-1986-A MAP Sensor ....................................GM# 16137039
Fuel Pump Relay...GM# 14089936 Delco# 15-8240 Idle Air Control ................................GM# 17113099
Coolant Temperature Sensor ..........GM# 25036979 Knock Sensor ...................................Delco# 213-96
Coil.......................................................Delco# D-573 Air Pump Relay....GM# 14100455 Delco# 15-8426
Oxygen Sensors...GM# 25312184 or Delco# AFS 75 Air Pump......................................Delco# 2604-4885
TPS Sensor.........................................GM# 17106680 MAF Sensor.....................................Delco# 213-252
Canister Purge Solenoid GM# 1997201 Delco# 214-565
NOTE: Components with part numbers other then the ones listed may plug into the 60502 or 60505
harness, but the part numbers MUST match the ones on this list for proper operation. An adapter is
included to adapt the 4-pin square IAC connector to the '94-'96 flat 4-pin connector.

5.2 ROUGH INSTALLATION
CAUTION: DISCONNECT THE POWER FROM YOUR VEHICLE BY REMOVING THE
NEGATIVE BATTERY CABLE FROM THE BATTERY.
Note: Make no wire connections or permanent mounting of any kind at this time.
5.2.1 Position the computer and sensors in their intend locations.
5.2.2 Drill a 1-5/8" hole for the firewall grommet near the computer for the engine group and tail section
to pass through.
5.2.3 Route the engine group and tail section through the hole. Push the grommet (already installed on
the harness) into the hole until it is seated.
5.2.4 Route the dash group over to the driver's side of the car.
5.2.5 Route the fuse block and relays to the place they will be mounted.
5.3 HARNESS ATTACHMENT
Note: Harness routing and shaping will be a time-consuming task. Taking your time will enhance
the beauty of your vehicle. Please take your time and be patient.
5.3.1 Permanently mount your computer. You should mount the fuse block and relays at this time.
5.3.2 Mold harness groups to the contour of the dash, engine, frame, etc. Remember to route harness
away from sharp edges, exhaust pipes, hinges, and moving parts.
5.3.3 Attach harness groups to your automobile with clips or ties starting at the computer and working
your way outward.
Note: Do not tighten tie wraps or mounting devices at this time. Make all harness attachments
LOOSELY.
5.3.4 When used every 1-1/2" or so on the visible areas of the harness, colored plastic wire ties make a
very attractive assembly. Otherwise, a tie installed in other areas every 6" or so will hold the wires
in place securely. REMEMBER TO TAKE YOUR TIME.
5.4 TERMINAL INSTALLATION INSTRUCTION
Note: In the following steps you will be making the circuit connections. Before you start, you
should carefully read Sections 6.0, and continually refer to the wire charts, DOUBLE
CHECKING your length calculations before cutting any wire or making any connections.
These directions are for the wires, which do not have a connector already, installed on them.
5.4.1 Have all tools and connectors handy.
5.4.2 Select the correct terminal for the wire and application.
5.4.3 Determine the correct wire length and cut the wire. Remember to allow enough slack in the
harness and wires at places where movement could occur. DOUBLE CHECK YOUR
CALCULATIONS.
5.4.4 Strip insulation away from wire. Only strip as much insulation off as necessary for the type of
terminal lug you are using.
Note: In the following step, make sure that the terminal is crimped with proper die in the crimping
tool. An improper crimp will not make a good connection. DO NOT OVER-CRIMP.
5.4.5 Crimp the terminal onto the wire.
5.4.6 Connecting the wires and connectors throughout the harness is a simple process. Make sure that
each wire is properly routed and then attached. DO NOT ATTACH THEN ROUTE
AFTERWARD.
5.4.7 When all the wires are attached, tighten the mounts and ties to secure the harness permanently.
5.4.8 Attach the connectors to the computer. BEING VERY CAREFUL NOT TO BEND ANY PINS.
5.4.9 After all connections have been made throughout the harness, connect the battery to the vehicle.
4

CAUTION: BE SURE THE IGNITION IS OFF WHEN YOU RECONNECT THE BATTERY
OR YOU WILL DAMAGE THE COMPUTER.
6.0 GM 94 & 95 LT1 SYSTEM WIRE HARNESS INSTALLATION INSTRUCTIONS
6.1 CONTENTS OF THE 60502 OR 60505 WIRE HARNESS KIT
Take inventory to see that you have everything you are supposed to have in this kit. If anything is missing, contact
the dealer where you obtained the kit or contact Painless Performance at [phone]. The kit should contain the
following items:
~ The main wire harness with the connectors already on the ends of most of the wires.
~ Fuel Injection Installation Instructions P/N 90517 (This Booklet).
6.2 SPECIFIC CIRCUIT CONNECTIONS
Note: If you have not already done so, read sections 4.0 and 5.0 of these instructions and think
through the installation of the harness before securing or cutting any wires.
6.2.1 DASH SECTION INSTALLATION
The wires in this group consist of the diagnostic link connector (DLC) (SEE FIGURE 6.1), the check
engine light (pre-mounted into a mounting bracket), and 13 other wires.
Note: You may need to connect the check engine light wires to their mates in the wire harness.
CAUTION: DO NOT MAKE ANY CONNECTIONS WHILE THE COMPUTER IS PLUGGED
INTO THE HARNESS.
Note: Wire color (Example: Blk/Wht) is one wire with a stripe. The second color (the stripe) may
not be bold. Observe all two-color wires closely.
A. Find a suitable location to mount the DLC connector (using the bracket that the light is mounted
in) that will allow access to the front of the connector and still allow you to see the light while
driving.
B. Mount the DLC connector using the bracket containing the check engine light in the place
selected.
C. Locate the pink ignition hot activation wire, labeled "fuse block ignition B+ (18 Ga.) for the fuse
block and attach it a 12V fused power source where there is power
5
FIGURE 6.1 DLC Connector & Check Engine Light

WHEN THE KEY IS IN THE START AND RUN POSITION. This is the power wire for the fuel
injection harness. If the pink wire is connected correctly, the check engine light will come on when
the ignition is "ON or START".
D. Locate the Orn/Blk and Blk/Wht wires in the dash group. These two wires are for the Park/Neutral
INDICATOR Switch, NOT the Neutral Safety Switch. If you have a GM column then you can
use the combination switch P/N 15679680 and wire it as described in paragraph 2 or 3 below.
The ORN/BLK wire needs to be grounded in "Park and Neutral" and ungrounded in "Drive". This
can also be done with a toggle switch or a switch on the parking brake.
CAUTION: DO NOT CONNECT THESE WIRES USING DIRECTIONS FROM DIFFERENT
PARAGRAPHS. YOU MAY DAMAGE THE COMPUTER.
D.1. If you are NOT using a vehicle speed sensor (VSS) or Park/Neutral Indicator Switch then you will
need to connect these two wires together.
Note: If you do this, the computer will stop controlling the exhaust gas recirculation (EGR)
solenoid. THIS WILL PREVENT THE SYSTEM FROM BEING STREET-LEGAL.
D.2. If you are going to use the recommended switch for the computers benefit ONLY, then you will
wire it as shown in Illustration A.
D.3. The recommended switch is a combination reverse light AND neutral safety switch. You may use
it for these purposes AND the computer signal IF you wire it EXACTLY as shown in
Illustration B.
D.4. You may want to install your own switch. This switch must connect the Orn/Blk wire to ground
only when the car is in PARK OR NEUTRAL. You may or may not want to use the Blk/Wht
wire. The other end of the Blk/Wht wire is already grounded throughout the harness.
E. The single light blue wire is the wire that lets the computer know when the brake is applied. If you
ARE NOT using a 4L60E then you will tape off and store this wire. If you ARE using the 4L60E
transmission then you will have to install an electrical switch described in Paragraph 4.1.2. The pink
wire provides power for this switch.
6
FIGURE 6.2 Brake Switch Connection

7
FIGURE 6.3 Brake Switch Relay
FIGURE 6.4 Gear Indicator Switch

F. If you are using the recommended brake switch then you will wire it according to Figure 6.2.
The pink wire to the back of the switch in the illustration is the wire that has power on it
whether or not the brake is being applied.
CAUTION: FAILURE TO WIRE THIS SWITCH CORRECTLY WILL RESULT IN A
DANGEROUS SITUATION ON THE VEHICLE.
G. If your vehicle has a pressure type brake switch, you may use a relay as shown in Figure 6.3. The
relay must be a SPDT Relay and wired correctly or it could result in a dangerous situation with
the vehicle. The torque converter may not unlock.
The fuel pump connector has a small gray wire at the bottom of it that terminates in a female
connector. This wire is a test point for the fuel pump. After the vehicle has been wired and tested
OK, tape off this wire and store it in the harness.
H. The wires labeled VATS (lt. green, red and black) are to be connected to the matching wires on the
VATS module supplied in the kit.
I. Fan #1 relay wire (green) and fan #2 relay wire (blue) are relay ground wires activated by the
computer.
Note: Fan #1 will come ON at 226°f and go OFF at 221°f.
Fan #2 will come ON at 235°f and go OFF at 230°f.
J. The wire labeled TACH (white) is the signal wire for a tachometer is used.
K. The VSS output wire sends out a signal to operate the electronic cruise control or speedometer if
so equipped.
6.2.2 Dash Section Connections
WIRE COLOR # OF POSITIONS LABELED CONNECT TO:
IN CONNECTOR
Brown (4) Red (2) 4 Air Pump Relay Relay
Brown, Green/White 2 Canister Purge Canister Purge Solenoid
Black, Red (2) 3 Air Pump Air Pump
Gray, Green/White, Black/White, Pink 4 Fuel Relay Fuel Pump Relay
Green/White VSS Output Speedometer/Cruise
White Tach Tachometer
Orange/Black, Black/White P/N switch Park/Neutral Switch
Pink, Light Blue/Black Brake Switch Brake Switch
Pink Fuse Block B+ Ignition Power
8
FIGURE 6.5 Air Pump Relay Connector FIGURE 6.6 Canister Purge Solenoid
TABLE 6.1 Dash Section Connections

6.3 ENGINE GROUP INSTALLATION
The engine group is designed to be separated into left side (driver) and right side (passenger) sections. Each
side is tie-wrapped separately, BUT NOT LABELED. The right side of the engine has the connectors for
the idle air control, throttle position sensor, distributor, and map sensor, all of which ARE labeled. When
you begin routing, FIRST separate the engine group into left and right sections and place them accordingly.
6.3.1 Before you connect any wires, separate the tail section from the engine group and place it out of
the way.
6.3.2 Locate the two Blk/Wht wires in the harness that end in a single, large ring terminal and ground
them to the engine.
6.3.3 Using Figure 6.4-6.8, and the specific connections indicated in Table 6.1, connect the wiring as
directed.
NOTE: The air pump connector is rolled up in the dash section and must be routed out to
the engine compartment if the air pump is to be operational. See section 4.1 Paragraph 4.1.3
6.3.4 Check to make sure that the 60502-wire harness has the correct distributor connector on it for your
particular engine. There are two different connectors used on LT1 engines. The 92 &93 engines
used a short connector, 1" long and the 94 and up engines use a 2" connector. This 60502 harness
has the 2" connector made on it. You may reuse the original connector or contact Painless
Performance for a 1" pigtail connector.
6.3.5 The pink wire labeled coil power needs to be connected to the wire that powered the coil on the
original engine.
9
FIGURE 6.7 Air Pump Connection FIGURE 6.8 Fuel Pump Relay Connector

6.3.6 Engine Section Connections
WIRE COLOR # OF POSITIONS LABELED CONNECT TO:
IN CONNECTOR
Brown, Gray 2 EGR EGR Solenoid
Blue 1 Knock Knock Sensor
Purple/White, Tan/White, Brown, Black 4 Driver Side Oxy Left Oxygen Sensor
Purple, Tan, Brown, Black 4 Pass. Side Oxy Right Oxygen Sensor
Red Ring Terminal (2) Starter B+ Starter Solenoid
Gray, Light Green, Black 3 MAP Map Sensor
Pink, Black 2 Inj # 1 Drivers Side Front Inj
Pink, Light Green/Black 2 Inj # 2 Pass Side Front Inj
Pink, Pink/Black 2 Inj # 3 Drivers Side 2nd Inj
Pink, Light Blue/Black 2 Inj # 4 Pass Side 2nd Inj
Pink, Black/White 2 Inj # 5 Drivers Side 3rd Inj
Pink, Yellow/Black 2 Inj # 6 Pass Side 3rd Inj
Pink, Red/Black 2 Inj # 7 Drivers Side 4th Inj
Pink, Blue/White 2 Inj # 8 Pass Side 4th Inj
Gray, Black, Blue 3 TPS Throttle Position Sensor
Light Green/Black, Light Green/White
Light Blue/Black, Light Blue/White 4 IAC Idle Air Control Motor
Yellow, Black/White, Pink 3 MAF Mass Airflow Sensor
Red/Black, Pink/Black,
Red, Light Blue/Black 4 DIST Distributor
White, Black, Pink/Black, White/Black 4 IGN MOD Ignition Module
Pink, White 2 Coil Ignition Coil
Pink/Black, White/Black 2 Coil Ignition Coil
Black, Yellow 2 ECT Engine Coolant Temp.Sensor
Black, Tan 2 IAT Intake Air Temp Sensor
Black, Black/White (3) Ring Terminal (2) Ground Engine Ground
Pink Coil Power Power For Coil
10
FIGURE 6.9 EGR Solenoid
TABLE 6.2 Engine Section Connections
FIGURE 6.10 Knock Sensor

11
FIGURE 6.11 Oxygen Sensor FIGURE 6.12 MAP Sensor
FIGURE 6.14 Injectors 2, 4, 6, 8
FIGURE 6.15 TPS Sensor FIGURE 6.16 IAC
FIGURE 6.13 Injectors 1, 3, 5, 7

12
FIGURE 6.17 MAF Sensor FIGURE 6.18 Distributor
i
FIGURE 6.19 Ignition Module FIGURE 6.20 Coil
FIGURE 6.21 ECT Sensor FIGURE 6.22 IAT Sensor

6.4 TAIL SECTION INSTALLATION
6.4.1 Locate the tail section that you earlier separated from the engine group. Begin routing it towards
the rear of the vehicle. Be sure to avoid all sharp edges, moving or hot parts, or anything else that
may damage the harness.
6.4.2 If you ARE using the 4L60E transmission, route the 13-position connector to the transmission and
attach it.
6.4.3 If you ARE NOT using the 4L60E transmission, tape up the connector and store it in the harness.
6.4.4 Take the gray wire and route it to the fuel pump. This is the power wire for the fuel
pump.
6.4.5 Take the connector for the Vehicle Speed Sensor (VSS) and connect to the Vehicle Speed Sensor.
6.4.6 Tail Section Connections
WIRE COLOR # OF POSITIONS LABELED CONNECT TO:
IN CONNECTOR
Purple, Yellow 2 VSS Speed Sensor
Gray Fuel Pump Fuel Pump
Light Green, White, Light Blue/White,
Tan/Black, Brown, Pink, Yellow/Black,
Red/Black, Pink/Black, Blue, Red,
Yellow/White, Black 13 Trans Transmission
7.0 TROUBLE- SHOOTING INSTRUCTIONS
If you are having trouble with your engine running badly or not running at all, first perform basic trouble-
shooting (ensure that you are using the correct parts (Table 4.1), check for faulty connections, blown fuses,
connection of VATS module, spark, timing, fuel pressure, etc.), then see if the computer has stored a
trouble code in its memory.
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FIGURE 6.23 VSS FIGURE 6.24 Transmission Connection
TABLE 6.3 Tail Section Connections

7.1 THE "CHECK ENGINE" LIGHT
Normally, the "check engine" light should come on when the ignition is turned on, then go out a few
moments after the engine starts running. If it reappears, or stays on while the engine is running, the
computer has detected a problem and a trouble code has been set.
7.2 RETRIEVING TROUBLE CODES FROM THE COMPUTER
The chart below shows the type of ALDL test connector each vehicle came with from the
factory. If you are using a computer with ’94 Camaro/Firebird, ’94-’95 Caprice or ’95
Impala programming you must obtain a OBD 1 connector. We will provide this
connector at no charge by calling our tech line at 800-423-9696. Ask for part number
WH-365.
1994 1995 1996
Camaro OBD 1 OBD 11 OBD 11
Firebird OBD 1 OBD 11 OBD 11
Caprice OBD 1 OBD 1 OBD 11
Impala --------- OBD 1 OBD 11
7.2.1 In order to retrieve the trouble codes stored in the computer, a scanner must be connected to the
Assembly Diagnostic Link (DLC) connector (installed and connected in Paragraph 6.2.1). Follow
the instructions provided with the scanner to read the codes set in the computer.
7.2.2 After you have read any codes, write them down for reference. Remove the connector from the
DLC connector.
7.2.3 Take the codes one at a time and match them to the codes in Table7.1. This will tell you in which
circuit the computer has detected a problem.
Note: A code indicates a problem in a specific circuit, NOT THAT A PARTICULAR PART IS
BAD
.
7.2.4 Before taking more extensive corrective actions for any trouble codes, make sure that all
connections on the indicated circuit, INCLUDING THE COMPUTER, are clean and tight.
Inspect the wiring in the circuit for any broken, shorted, or exposed wires. Finally, insure all
ground wires are clean and secure.
7.2.5 If a trouble code is detected and the problem has been fixed, clear the codes by first making sure
the ignition is off then disconnecting the NEGATIVE battery cable for at least 3 minutes.
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FIGURE 7.1 Fuse Identification

7.2.6 Trouble Code Chart, Diagnostic Trouble Code (DTC)
DTC 11 = Malfunction Indicator Lamp
DTC 13 = Bank 1 (left) Heated Oxygen Sensor (HO2S) Open Circuit
DTC 14 = Engine Coolant Temperature (ETC) Sensor Circuit (Signal Voltage Low) Overheated
DTC 15 = Engine Coolant Temperature (ETC) Sensor Circuit (Signal Voltage High) Engine cold
DTC 16 = Distributor Ignition System (Low Resolution Pulse)
DTC 18 = Injector Circuits
DTC 21 = Throttle Position (TP) Sensor Circuit (Signal Voltage High)
DTC 22 = Throttle Position (TP) Sensor Circuit (Signal Voltage Low)
DTC 23 = Intake Air Temperature (IAT) Sensor Circuit (Signal Voltage High) Cold Intake Air
DTC 24 = Vehicle Speed Sensor (VSS) Circuit
DTC 25 = Intake Air Temperature (IAT) Sensor Circuit (Signal Voltage Low) Hot Intake Air
DTC 26 = Evaporative Emission (EVAP) Canister Purge Solenoid Valve Circuit
DTC 27 = Exhaust Gas Recirculation (EGR) Vacuum Control Solenoid Valve Circuit
DTC 28 = Transmission Range (TR) Pressure Switch Assembly Fault
DTC 29 = Secondary Air Injection (AIR) Pump Circuit
DTC 32 = Exhaust Gas Recirculation (EGR)
DTC 33 = Manifold Absolute Pressure (MAP) Sensor Circuit (Signal Volts High, Low Vacuum)
DTC 34 = Manifold Absolute Pressure (MAP) Sensor Circuit (Signal Volts Low, High Vacuum)
DTC 36 = Distributor Ignition System (Faulty High or Extra Low Resolution Pulse Detected)
DTC 37 = Brake Switch Stuck "ON"
DTC 38 = Brake Switch Stuck "OFF"
DTC 41 = Ignition Control (IC) Circuit (Open Circuit)
DTC 42 = Ignition Control (IC) Circuit (Shorted or Grounded Circuit)
DTC 43 = Knock Sensor (KS) Circuit
DTC 44 = Bank 1 (Left) Heated Oxygen Sensor (HO2S) Circuit (Lean Exhaust Indicated)
DTC 45 = Bank 1 (Left) Heated Oxygen Sensor (HO2S) Circuit (Rich Exhaust Indicated)
DTC 46 = Pass-Key Circuit
DTC 47 = Knock Sensor (KS) Module Circuit or Module Missing
DTC 48 = Mass Air Flow (MAF) Sensor Circuit
DTC 50 = System Voltage Low
DTC 51 = EEPROM Programming Error
DTC 53 = System Voltage High
DTC 55 = Fuel Lean Monitor
DTC 58 = Transmission Fluid Temperature (TFT) Sensor Circuit Low (High Temp Indicated)
DTC 59 = Transmission Fluid Temperature (TFT) Sensor Circuit High (Low Temp Indicated)
DTC 61 = A/C System Performance
DTC 63 = Bank 2 (Right) Heated Oxygen Sensor (H02S) Circuit (Open Circuit)
DTC 64 = Bank 2 (Right) Heated Oxygen Sensor (H02S) Circuit (Lean Exhaust Indicated)
DTC 65 = Bank 2 (Right) Heated Oxygen Sensor (H02S) Circuit (Rich Exhaust Indicated)
DTC 66 = A/C Refrigerant Pressure Sensor Circuit (Open or Shorted)
DTC 67 = A/C Refrigerant Pressure Sensor Circuit (Pressure Sensor or A/C Clutch Problem)
DTC 68 = A/C Relay Circuit (Shorted Circuit)
DTC 69 = A/C Clutch Circuit
DTC 70 = A/C Clutch Relay Driver Circuit
DTC 71 = A/C Evaporator Temperature Sensor Circuit (Open or Shorted)
DTC 72 = Vehicle Speed Sensor Loss (Automatic Transmissions Only)
DTC 73 = Pressure Control Solenoid (PCS) Circuit (Current Error)
DTC 74 = Traction Control Circuit (TCS) Circuit Low
DTC 75 = Transmission System Voltage Low
DTC 77 = Cooling Fan Relay Control Circuit
DTC 79 = Transmission Fluid Overtemp
DTC 81 = Transmission 2-3 Shift Solenoid Circuit
DTC 82 = Transmission 1-2 Shift Solenoid Circuit
15

DTC 83 = Reverse Inhibit System (Manual Transmission)
DTC 83 = TCC PWM Solenoid Circuit Fault (Automatic Transmission)
DTC 84 = Automatic Transmission 3-2 Control Solenoid Circuit
DTC 84 = Skip Shift Solenoid Circuit (Manual Transmission)
DTC 85 = Transmission TCC Stuck "ON"
DTC 90 = Transmission TCC Solenoid Circuit (Manual Transmission)
DTC 91 = Skip Shift Lamp Circuit
DTC 97 = VSS Output Circuit
DTC 99 = Tach Output Circuit
7.3 WHEN TO CALL PAINLESS PERFORMANCE PRODUCTS' TECH LINE
7.3.1 These harness kits have been built with the highest regard to quality control. Before calling us
please double check all connections and perform normal basic trouble-shooting (fuel pressure,
timing, ignition system, etc.).
7.3.2 If you have any questions concerning the installation of this harness or having trouble in general,
feel free to call Painless Performance Products' tech line at [phone]. Calls are answered
from 8am to 5pm central time, Monday thru Friday, except holidays. Email questions to
[email protected]
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TABLE 7.1 Diagnostic Trouble Codes