Vintage Air 1970-78 Camaro User manual

1970-78 Camaro
without Factory Air
561173
901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 1 OF 29
an ISO 9001:2008 Registered Company
18865 Goll St. San Antonio, TX 78266 ph: 210-654-7171 fax: [phone]

2
901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 2 OF 29
Table of Contents
3. Packing List/Parts Disclaimer
4. Information Page
5. Wiring Notice
6. Engine Compartment, Condenser Assembly & Installation,
Compressor & Brackets, Pulleys
Figure 1
7. Passenger Compartment
Figures 2 & 3
8. Passenger Side Kick Panel Modification
Figures 4 & 4a
9. Defrost Duct/Fresh Air Cover Installation & Hose Adapter
Installation
Figures 5, 5a & 6
10. Fresh Air Cover Installation & Kick Panel Fresh Air Cap Installation
Figures 7, 8, 8a & 8b
11. Firewall Cover & Evaporator Bracket and A/C & Heater Hose Installation
Figures 9 & 10
12. Evaporator Bracket and Heater Fitting Installation (Cont.)
Figure 11
13. Evaporator Installation
Figures 12 & 12a
14. Drain Hose Installation & Center Louver Mounting Holes
Figures 13, 14 & 14a
15. Center Louver Installation
Figures 15 & 15a
16. Lubricating O-rings, Standard Hose Kit & Modified A/C Hose Kit
Figure 16
17. 1970-73 Camaro Heater Hose & Heater Control Valve Installation
Figure 17
18. 1974-78 Camaro Heater Hose & Heater Control Valve Installation
Figure 18
19. Final Steps and Glove Box Installation
Figures 19, 20 & 20a
20. Control Panel & Duct Hose Routing
Figures 21 & 22
21. Wiring Diagram
22. Gen IV Wiring Connection Instruction
23. Operation of Controls
24. Troubleshooting Information
25. Troubleshooting Information (Cont.)
26. Kick Panel Modification Template
27. Center Louver Template
28. Glove Box Light Template
29. Evaporator Kit Packing List

3
901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 3 OF 29
1
Accessory Kit
781178
2
4-Vent Evaporator
Sub Case w/ 204 ECU
744004-VUE
** Before beginning installation, open all packages and check contents of shipment. Please report
any shortages directly to Vintage Air within 15 days. After 15 days, Vintage Air will not be
responsible for missing or damaged items.
1.
2.
1
1
744004-VUE
781178
4-Vent Evaporator Sub Case w/ 204 ECU
Accessory Kit 1970-78 Camaro wo A/C
No. Qty. Part No. Description
Packing List
Evaporator Kit (561173)
NOTE: Images may not depict actual parts and quantities.
Refer to packing list for actual parts and quantities.

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901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 4 OF 29
Use of Any Other Refrigerants Will Void All Warranties of the Air
Conditioning System and Components. Use of the Proper Type and
Amount of Refrigerant Is Critical to Proper System Operation. Vintage
Air Recommends Our Systems Be Charged By Weight With a Quality
Charging Station or Scale.
Service Info:
Safety Switches:
Important Notice—Please Read
Attention: The following system components are capped: Compressor, evaporator, condenser & drier.
Caps may be under pressure with dry nitrogen. Be careful removing caps. Do not remove caps prior to
installation. Removing caps prior to installation will cause components to collect moisture and lead to
premature failure and reduced performance.
Evacuate the system for 35-45 minutes with system components (Drier, compressor, evaporator and
condenser) at a temperature of at least 85°F. On a cool day, the components can be heated with a heat
gun OR by running the engine with the heater on before evacuating. Leak check and charge to
specifications.
For Maximum System Performance, Vintage Air Recommends the Following:
Heater hose may be purchased from Vintage Air (Part# 31800-VUD) or your local parts retailer.
Routing and required length will vary based on installer preference.
Vintage Air Systems Are Designed to Operate With R134a
Refrigerant Only! Use of Any Other Refrigerants Is a Fire Hazard and
Could Damage Either Your Air Conditioning System or Your Vehicle.
Refrigerant Capacity for Vintage Air Systems:
(For other systems, consult manufacturer’s guidelines)
R134a System
Charge with 1.8 lbs. (1 lb., 12 oz.) of refrigerant.
Lubricant Capacities:
New Vintage Air-supplied Sanden Compressor: No additional oil needed (Compressor is
shipped with proper oil charge).
All Other Compressors: Consult manufacturer (Some compressors are shipped dry and will
need oil added).
Your Vintage Air system is equipped with a binary pressure safety switch. A binary switch disengages
the compressor clutch in cases of extreme low pressure conditions (Refrigerant Loss) or excessively
high head pressure (406 PSI) to prevent compressor damage or hose rupture. A trinary switch
combines Hi/Lo pressure protection with an electric fan operation signal at 254 PSI, and should be
substituted for use with electric fans. Compressor safety switches are extremely important since an
A/C system relies on refrigerant to circulate lubricant.
Heater Hose (Not Included With This Kit):
To ensure a watertight seal between the passenger compartment and the vehicle exterior, for all
bolts passing through the cowl and/or firewall, Vintage Air recommends coating the threads with
silicone prior to installation.
Bolts Passing Through Cowl and/or Firewall:

5
901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 5 OF 29
Important Wiring Notice—Please Read
Some Vehicles May Have Had Some or All of Their Radio Interference Capacitors Removed.
There Should Be a Capacitor Found At Each of the Following Locations:
1. On the positive terminal of the ignition coil.
2. If there is a generator, on the armature terminal of the generator.
3. If there is a generator, on the battery terminal of the voltage regulator.
Most alternators have a capacitor installed internally to eliminate what is called “whining” as
the engine is revved. If whining is heard in the radio, or just to be extra cautious, a radio
interference capacitor can be added to the battery terminal of the alternator.
It is also important that the battery lead is in good shape and that the ground leads are not
compromised. There should be a heavy ground from the battery to the engine block, and
additional grounds to the body and chassis.
If these precautions are not observed, it is possible for voltage spikes to be present on the
battery leads. These spikes come from ignition systems, charging systems, and from
switching some of the vehicle’s other systems on and off. Modern computer-operated
equipment can be sensitive to voltage spikes on the power leads, which can cause unexpected
resets, strange behavior, and/or permanent damage.
Vintage Air strives to harden our products against these types of electrical noise, but there is
a point where a vehicle’s electrical system can be degraded so much that nothing can help.
Radio interference capacitors should be available at most auto and truck parts suppliers. They
typically are cylindrical in shape, a little over an inch long, a little over a half inch in diameter,
and they have a single lead coming from one end of the cylinder with a terminal on the end of
the wire, as well as a mounting clip which is screwed into a good ground on the vehicle. The
specific value of the capacitance is not too significant in comparison to ignition capacitors that
are matched with the coil to reduce pitting of the points.
Care must be taken, when installing the compressor lead, not to short it to ground.
The compressor lead must not be connected to a condenser fan or to any other
auxiliary device. Shorting to ground or connecting to a condenser fan or any other
auxiliary device may damage wiring, the compressor relay, and/or cause a
malfunction.
When installing ground leads on Gen IV systems, the blower control ground and ECU
ground must be connected directly to the negative battery post.
For proper system operation, the heater control valve must be connected to the
ECU.
•
•
•

6
901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 6 OF 29
Condenser Assembly & Installation
Compressor & Brackets
Pulleys
OEM Heater
Wiring/Vacuum
Harness
Molded Grommet
Hood Latch
and Support
Assembly
Battery &
Battery Tray
Inner
Fender Panel
Outer
Fender Heater Hose
Clamp
OEM
Blower Motor
Assembly
Radiator
Engine Compartment
Before starting the installation, check the function of the vehicle (horn, lights, etc.) for proper
operation. Study the instructions, illustrations & diagrams.
Remove the Following:
1. Battery and battery tray (retain) (See Figure 1, below).
2. Drain radiator.
3. Hood latch assembly (retain) including hood latch support.
4. Heater blower motor assembly (discard). To remove the heater blower motor assembly (under hood) and
the air distribution system (under dash), remove inner fender (See Figure 3, below).
5. OEM heater hoses (discard) (See Figure 1, below).
6. Remove OEM heater wiring/vacuum harness molded grommet (See Figure 1, below).
1. Refer to separate instructions included with the condenser kit to install the condenser.
2. Binary switch installation (refer to condenser instructions).
1. Refer to separate instructions included with the bracket kit to install the compressor bracket.
1. In most instances, the belt lengths will remain the same.
Figure 1

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901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 7 OF 29
NOTE: Removal of dashboard is not required to install the evaporator. Vintage Air recommends that
you utilize the factory service manual when you disassemble and reassemble the dashboard.
Remove the Following:
1. Glove box door (See Figure 3, below).
2. Glove box (discard, retain screws) (See Figure 2, below).
3. Heater assembly and all related ducting (discard, retain screws) (See Figure 3, below).
4. Driver/passenger side louver outlets (retain). Instrument panel must be removed to get to left outlet and
control panel (See Figure 3, below).
5. Control panel assembly (discard) (See Figure 3, below). Refer to control panel conversion kit instructions
for installation of controls.
6. Remove passenger side kick panel (retain). Disconnect passenger side fresh air cable from panel (See
Figure 3, below). Disconnect driver/passenger cable astro-ventilation ducting (discard).
7. Remove OEM defrost duct assembly (discard).
Driver Side
Astro Ventilation
Duct
Figure 3
Driver Side
Louver
Driver Side
Kick Panel
Control
Panel
Instrument
Panel
Passenger Side
Louver
Passenger Side
Astro
Ventilation
Duct
Astro
Fresh
Passenger Side
Kick Panel
Glove Box
Door
Heater
Assembly
Passenger Compartment
Glove Box
Figure 2

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901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 8 OF 29
Passenger Side
Kick Panel Modification
Figure 4a
1. Remove kick panel by removing the (5) OEM screws. Disconnect the fresh air door from the lever
housing (See Figure 4, below).
2. Cut kick panel grille using template provided on Page 24 (See Figure 4a, below).
3. Enlarge OEM lever housing holes to 1/2” (See Figure 4a, below).
4. Install (2) 1/2” plastic plugs in OEM lever housing holes (See Figure 4a, below).
Grille
Template
Kick
Panel
(5) OEM
Screws
OEM Lever
Housing Kick
Panel
Enlarge OEM
Lever Housing
Holes To 1/2”
1/2” Plastic
Plug
31102-GUR
Figure 4

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901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 9 OF 29
Driver Side
Defrost
Duct
627171-PCA
10-24 Nut
w/ Star Washer
10-24 X 3/8”
Pan Head
Screw
OEM
Defrost Duct
Mounting Flange
Driver Side
Fresh Air
Cap
498851
Passenger Side
Defrost
Duct
627171-PCA
Pass. Side
Fresh Air
Cap
498852
Silicone
OEM
Screws
OEM
Screws
1. Install the defrost ducts under dash on OEM defrost duct mounting flange as shown in Figure 5, below.
Secure using 10-24 X 3/8” pan head screw and 10-24 nut w/ star washer.
2. Apply a 1/4” bead of silicone around the back side of the driver/passenger side fresh air caps as shown in
Figure 5a, below.
3. Install driver/passenger side fresh air caps and secure using OEM screws (See Figure 5, below).
Defrost Duct/
Fresh Air Cover Installation
Figure 5
Figure 6
Figure 5a
Hose
Adapter
(2) S-clips
Hose Adapter Installation
1. Install (2) S-clips on hose adapter as shown in Figure 6, below.
2. Install driver & passenger side hose adapters on OEM louvers (See Figure 6, below).

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901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 10 OF 29
1/4-20 X 1 1/2”
Bolt w/
Washer
Fresh Air Cover and
Heater Cover Bracket Installation
Silicone
Fresh Air
Cap
(4) Grommets
33137-VUI
Back Side
of Fresh Air
Cap
Engine
Compartment
Firewall
1. Install (4) grommets in fresh air cap (See Figure 7, below).
2. Apply a 1/4” bead of silicone around the back side of the fresh air cap as shown in Figure 7, below.
3. Attach fresh air cap to firewall using a 1/4-20 x 1 1/2" bolt and washer, see Figure 7, below. NOTE: Fresh air
cap installs on engine side of firewall.
4. Install 1 ¼” plug in firewall (See Figure 7, below).
Kick Panel Fresh Air Cap Installation
1. Install (4) grommets in kick panel fresh air cap (See Figure 8a, below).
2. Route A/C and heater hose through fresh air cap and kick panel fresh air cap as
shown in Figures 8 and 8b, below.
3. Apply a 1/4” bead of silicone around the back side of kick panel fresh air cap as
shown in Figure 8a, below.
4. Secure kick panel fresh air cap using OEM screws as shown in Figure 8b, below.
(5) OEM
Screws
Silicone
Back Side of
Kick Panel
Fresh Air Cap
#10 A/C
Hose
#6 A/C
Hose
(2)Heater
Hoses
#10 A/C
Hose
#6 A/C
Hose
(2) Heater
Hose
(4)Grommets
33137-VUI
Figure 7
Figure 8b
Figure 8
Figure 8a
1 1/4” Plug
33132-VUI

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901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 11 OF 29
Engine
Compartment
Side of Firewall
(4) 1/4-20 X 1”
Hex Bolts
w/ Washers
NOTE: Firewall cover mounting holes
must be enlarged. Enlarge (5) existing
holes in firewall to 5/16”.
View Shown
From Inside Car
Through Dash
Figure 9
Back Side
of Firewall
Cover
Silicone
1/4” Nut
w/ Star Washer
1/4 X 3/4
Flat Washer
Evaporator Bracket and
A/C & Heater Hose Installation
1. On a work bench, install evaporator rear bracket and A/C & heater hose with properly lubricated O-rings
(See Figure 11, Page 12, and Figures 15, Page 15).
2. Install front mounting bracket on evaporator using (2) 1/4-20 x 1/2” hex bolts and tighten as shown in
Figure 10, below.
Firewall Cover Installation
1. Enlarge (5) OEM firewall holes to 5/16” (See Figure 9, below).
2. Apply a 1/4” bead of silicone around the back side of the firewall cover as shown in Figure 9, below.
3. From inside the car, install firewall cover on firewall (See Figure 9, below). From the engine compartment,
secure firewall cover to firewall using (4) 1/4-20 x 1”, hex bolts, (5) flat washers and 1/4” nuts w/ star
washers (See Figure 9, below).
(2) 1/4-20 X 1/2”
Hex Bolt
Figure 10
Firewall Cover
648233

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901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 12 OF 29
Rear Evaporator
Bracket ASM
644019
Evaporator Bracket and
Heater Fittings Installation (Cont.)
Figure 11
(2) Heater
Fittings
121004
1/4-20 X 1/2” Bolt
(Located on
Sub Case)
wo A/C
w/ A/C

13
901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 13 OF 29
Kick Panel
Fresh Air
Cap
(2) #14 X 3/4”
Sheet Metal
Screws
1/4-20 X 1” Bolt
w/ Washer
Evaporator Installation
1. Lift evaporator unit up under the dashboard (See Figure 12, below). Secure loosely to the firewall from the
engine compartment side using a 1/4-20 x 1” bolt and washer (See Figure 12, below).
2. Using (2) #14 x 3/4” sheet metal screws, secure the front evaporator mounting bracket to the inner cowl
(See Figure 12, below).
3. Verify that evaporator unit is level and square to the dash, and then tighten all mounting bolts. NOTE:
Tighten the bolt on firewall first. Then tighten the front mounting bracket screws.
#10 A/C
Hose
#6 A/C
Hose
Press
Tape
Heater
Hose
Hose
Clamps
Figure 12a
Figure 12

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901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 14 OF 29
1. Locate evaporator drain on bottom of evaporator case.
2. In line with the drain, lightly make a mark on the firewall. Measure one inch down and drill a 5/8” hole
through the firewall (See Figure 13, below).
3. Install drain hose to bottom of evaporator unit and route through firewall (See Figure 13, below).
1” Drain
Drain
Hose
Drain Hose Installation
Center Louver Mounting Holes
1970-78 CAMARO w/o AC
CENTER LOUVER
TEMPLATE
1. Cut out template provided on Page 27. Slide the template under the dash as shown in Figure 14, below.
Align the left and right sides of template with the crease in the dash as shown in Figures 14 & 14a, below.
Align bottom edge of the template along the bottom edge of dash as shown in Figures 14 & 14a, below.
2. Once template is aligned correctly and taped into place, mark mounting holes on dash. Once holes are
marked in the correct location, remove template and drill (2) 3/16” holes in dash for the center louver
bezel (See Figure 14a, below).
Figure 14
1970-78 CAMARO w/o AC
CENTER LOUVER
TEMPLATE
OEM
Hole
Figure 14a
Figure 13

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901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 15 OF 29
Center
Louver
Center
Louver Bezel
Washer
1. Install the center louver bezel under the dash and secure using (2) 10-32 x 3/4” pan head screws
w/ washers and 10-32 nuts w/star washers as shown in Figure 15, below.
2. Install the center louver into the bezel as shown in Figure 15, below.
3. Reinstall center console (if equipped) (See Figure 15a, below).
Center
Louver Bezel
Center Louver Installation
(2)10-32 X 3/4”
Pan Head Screws
w/ 10-32 Nuts w/ Star Washers
Final
Installation Final
Installation
w/ Center Console
(If Equipped)
Figure 15a
Figure 15

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901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 16 OF 29
Twist With
This
Wrench
Hold With
This
Wrench
1. Refer to separate instructions included with modified hose kit.
For a proper seal of fittings:
Install supplied O-rings as shown,
and lubricate with supplied oil.
Female
Nut
Male
Insert
Supplied Oil
for O-rings
#6 O-ring
#8 O-ring #10 O-ring
Figure 16
O-ring,
Slide Over
Male Insert to
Swaged Lip
O-ring
O-ring
Lubricating O-rings
1974-78 Camaro Standard Hose Kit
Modified A/C Hose Kit
1. Locate the #8 compressor A/C hose. Lubricate (2) #8 O-rings (See Figure 16, above) and connect the 90° female
fitting w/ R134a service port to the #8 discharge port on the compressor. Route the 45° female fitting to the #8
condenser hardline coming through the core support (See Figure 18, Page 18). Tighten each fitting connection
as shown in Figure 16, above.
2. Locate the #10 compressor A/C hose. Lubricate (2) #10 O-rings (See Figure 16, above) and connect the #10 135°
female fitting w/ R134a service port to the #10 suction port on the compressor. Route the 90° female fitting to the
#10 evaporator (See Figure 12a, Page 13, and Figure 18, Page 18). Tighten each fitting connection as shown in
Figure 16, above.
3. Locate the #6 evaporator A/C hose. Lubricate (2) #6 O-rings (See Figure 16, above) and connect the 90° female
fitting to the #6 hardline coming through the core support from the drier. Route the 90° female fitting to the #6
evaporator (See Figure 12a, Page 13, and Figure 18, Page 18). Tighten each fitting connection as shown in
Figure 16, above.
1970-73 Camaro Standard Hose Kit
1. Locate the #8 compressor A/C hose. Lubricate (2) #8 O-rings (See Figure 16, above) and connect the 90° female
fitting w/ R134a service port to the #8 discharge port on the compressor. Route the 45° female fitting to the #8
condenser hardline coming through the core support (See Figure 17, Page 17). Tighten each fitting connection
as shown in Figure 16, above.
2. Locate the #10 compressor A/C hose. Lubricate (2) #10 O-rings (See Figure 16, above) and connect the #10 135°
female fitting w/ R134a service port to the #10 suction port on the compressor. Route the 90° female fitting to the
#10 evaporator (See Figure 12a, Page 13, and Figure 17, Page 17). Tighten each fitting connection as shown in
Figure 16, above.
3. Locate the #6 evaporator A/C hose. Lubricate (2) #6 O-rings (See Figure 16, above) and connect the 45° female
fitting to the #6 hardline coming through the core support from the drier. Route the 90° female fitting to the #6
evaporator (See Figure 12a, Page 13, and Figure 17, Page 17). Tighten each fitting connection as shown in
Figure 16, above.

17
901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 17 OF 29
A/C & Heater Hose Routing
1970-73 Camaro
Compressor
Safety Switch
(Binary Type)
Screw On Drier
(Refer to
Condenser
Instructions)
Figure 17
#6 Drier/Core
Hardline
092074
(70-73 Camaro)
NOTE: Vintage Air Systems Require
(2) 5/8 Hose Nipples (Not Supplied)
#6 Hose
096082
Hose
Clamps
From Htr Cntrl Vlv
To Evaporator
Heater
Hose
FROM EVAPORATOR
TO WATER PUMP
Heater Hose & Heater Control Valve Installation
1. Route a piece of heater hose from the water pump to the top heater fitting of the heater core as shown in
Figure 12a, Page 13, and Figure 17, below. Secure using hose clamps.
2. Route a piece of heater hose from the intake to the bottom heater fitting of the heater core as shown in
Figure 12a, Page 13, and Figure 17, below. NOTE: Install heater control valve in line with intake
manifold (pressure side) heater hose, and secure using hose clamps as shown in Figure 17,
below. Also note proper flow direction.
#10 Adel
Clamp w/
10-32 x 1/2”
Pan
Head Screw
w/ Nut
#10 Suction
Hose
096073
#8 Discharge
Hose
096083
Tie Wrap
Heater Hose
(Heater Cntrl
Valve/Intake)
091074-PFD
#8 Cond/Comp
Hardline
#6 Drier/Cond
Hardline
091675
FROM INTAKE
MANIFOLD

18
901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 18 OF 29
A/C & Heater Hose Routing
1974-78 Camaro
(1978 Camaro Shown)
Compressor
Safety Switch
(Binary Type)
Screw On Drier
(Refer to
Condenser
Instructions)
Figure 18
#10 Adel
Clamp w/
10-32 x 1/2”
Pan
Head Screw
w/ Nut
#6 Drier/Core
Hardline
091681
(74-77 Camaro)
or
#6 Drier/Core
Hardline
091679
(78 Camaro)
#6 Drier/Cond
Hardline
091675
#10 Suction
Hose
096073
#8 Discharge
Hose
096081
NOTE: Vintage Air Systems Require
(2) 5/8 Hose Nipples (Not Supplied)
#6 Hose
096080
Hose
Clamps
From Htr Cntrl Vlv
To Evaporator
Heater
Hose
FROM EVAPORATOR
TO WATER PUMP
Tie Wrap
Heater Hose
(Heater Cntrl
Valve/Intake)
#8 Condenser/
Comp Hardline
091680
Heater Hose & Heater Control Valve Installation
1. Route a piece of heater hose from the water pump to the top heater fitting of the heater core as shown in
Figure 12a, Page 13, and Figure 18, below. Secure using hose clamps.
2. Route a piece of heater hose from the intake to the bottom heater fitting of the heater core as shown in
Figure 12a, Page 13, and Figure 18, below. NOTE: Install heater control valve in line with intake
manifold (pressure side) heater hose, and secure using hose clamps as shown in Figure 18,
below. Also note proper flow direction.
FROM INTAKE
MANIFOLD

19
901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 19 OF 29
1. Install duct hoses as shown in Figure 21, Page 18.
2. Install 3/8” ID grommet (See Figure 19, below).
3. Route A/C wires through 3/8 ID grommet as shown on Figure 19, below (12 volt/ground/binary switch/
heater valve).
4. Install control panel assembly.
5. Plug the wiring harness into the ECU module on the sub case as shown in Figure 21, Page 20 (Wire according
to wiring diagram on Pages 21 & 22).
6. Install glove box (See Figure 20, below).
7. Reinstall all previously removed items (battery tray & battery).
8. Fill radiator with at least a 50/50 mixture of approved antifreeze and distilled water. It is the owner’s
responsibility to keep the freeze protection at the proper level for the climate in which the vehicle is operated.
Failure to follow antifreeze recommendations will cause heater core to corrode prematurely and possibly burst
in A/C mode and/or freezing weather, voiding your warranty.
9. Double check all fittings, brackets and belts for tightness.
10. Vintage Air recommends that all A/C systems be serviced by a certified automotive air conditioning technician.
11. Evacuate the system for a minimum of 45 minutes prior to charging, and leak check prior to servicing.
12. Charge the system to the capacities stated on the information page (Page 4) of this instruction manual.
13. See Operation of Controls procedures on Page 23.
1. Install glove box provided, and secure with OEM screws through OEM holes (See Figure 20, below).
2. Install glove box door.
3/8” ID
Grommet
33144-VUI
Firewall
Cover
Final Steps
Glove Box Installation
Glove Box
Figure 20a
NOTE: If equipped with the glove box light as
shown below in Figure 20a, modify plastic
glove box using template provided on Page 25.
Figure 20
Figure 19

20
901196 REV B 07/08/14, INST 1970-78 CAMARO wo AC EVAP KIT PG 20 OF 29
Center Louver
Passenger Side
2 1/2” X 25”
Passenger Side
Louver
2 1/2” X 47”
Driver Side
Louver
2 1/2” X 40” Center Louver
Driver Side
2 1/2” X 25”
Driver Side
Defrost Duct
2” X 22”
Passenger Side
Defrost Duct
2” X 22”
Control Panel & Duct Hose Routing
Back Side
of PC Board
Assembly
Control Panel
Harness
From ECU
232007-VUR
Figure 21
Figure 22