Douglas Dynamics Western 26470-2 User manual

A DIVISION OR SUBSIDIARY OF DOUGLAS DYNAMICS, L.L.C.
November 1, 2007
Lit. No. 26473, Rev. 03
26470-2
TESTER
ISOLATION MODULE LIGHT SYSTEM
Operating Instructions
CAUTION
See your sales outlet/Web site for specific
vehicle application recommendations. The Kit
Selection Guide/Selection List has specific
vehicle and snowplow requirements.
CAUTION
Read this document before testing any
snowplows.

Lit. No. 26473, Rev. 03 3November 1, 2007
TABLE OF CONTENTS
Safety Information
Safety Definitions ....................................................................................................................................... 4
Before You Begin ........................................................................................................................................ 4
Fuses ......................................................................................................................................................... 4
Personal Safety .......................................................................................................................................... 4
Fire and Explosion ...................................................................................................................................... 5
Battery Safety ............................................................................................................................................. 5
All Modules
Test Preparation ......................................................................................................................................... 6
Isolation Module On-Vehicle Test ............................................................................................................... 6
4-Port Modules
Isolation Module 26400 (White Label) Off-Vehicle Test .............................................................................. 8
Isolation Module 27781 (Green Label) Off-Vehicle Test ............................................................................. 9
Isolation Module 26401 (Yellow Label) Off-Vehicle Test ........................................................................... 10
3-Port Modules
Isolation Module 29060 (White Label) Off-Vehicle Test ............................................................................ 11
Isolation Module 29070 (Green Label) Off-Vehicle Test ...........................................................................12
Isolation Module 29760 and 29760-1 (Blue Label) Off-Vehicle Test ......................................................... 13

Lit. No. 26473, Rev. 03 4November 1, 2007
SAFETY DEFINITIONS
NOTE: Indicates a situation or action that can lead
to damage to your snowplow and vehicle or other
property. Other useful information can also be
described.
BEFORE YOU BEGIN
• Park the vehicle on a level surface, place shift
lever in PARK or NEUTRAL and set parking brake.
WARNING
Indicates a potentially hazardous situation,
that if not avoided, could result in death or
serious personal injury.
CAUTION
Indicates a potentially hazardous situation
that, if not avoided, may result in minor or
moderate injury. It may also be used to alert
against unsafe practices.
SAFETY
WARNING
Lower blade when vehicle is parked. Temperature
changes could change hydraulic pressure,
causing the blade to drop unexpectedly or
damaging hydraulic components. Failure to do
this can result in serious personal injury.
WARNING
The tester shall keep bystanders clear of the
blade during this test. Do not stand between the
vehicle and the blade or within 8 feet of a
moving blade. A moving or falling blade could
cause personal injury.
CAUTION
Before starting any on-truck test, the snowplow
must be properly attached to the vehicle.
FUSES
The snowplow electrical and hydraulic systems
contain several automotive blade-style fuses. If a
problem should occur and fuse replacement is
necessary, the replacement fuse must be of the same
type and amperage rating as the original. Installing a
fuse with a higher rating can damage the system and
could start a fire. Fuse Replacement, including fuse
ratings and locations, is located in the Maintenance
Section of the Owner's Manual.
PERSONAL SAFETY
• Remove ignition key and put the vehicle in park or
in gear to prevent others from starting the vehicle
during installation or service.
• Wear only snug-fitting clothing while working on
your vehicle or snowplow.
• Do not wear jewelry or a necktie, and secure long
hair.
• Wear safety goggles to protect your eyes from
battery acid, gasoline, dirt and dust.
• Avoid touching hot surfaces such as the engine,
radiator, hoses and exhaust pipes.
• Always have a fire extinguisher rated BC handy,
for flammable liquids and electrical fires.

Lit. No. 26473, Rev. 03 5November 1, 2007
SAFETY
WARNING
Gasoline is highly flammable and gasoline
vapor is explosive. Never smoke while working
on vehicle. Keep all open flames away from
gasoline tank and lines. Wipe up any spilled
gasoline immediately.
CAUTION
Batteries normally produce explosive gases
which can cause personal injury. Therefore, do
not allow flames, sparks or lit tobacco to come
near the battery. When charging or working
near a battery, always cover your face and
protect your eyes, and also provide ventilation.
Batteries contain sulfuric acid which burns
skin, eyes and clothing.
Disconnect the battery before removing or
replacing any electrical components.
FIRE AND EXPLOSION
Be careful when using gasoline. Do not use gasoline
to clean parts. Store only in approved containers away
from sources of heat or flame.
BATTERY SAFETY

Lit. No. 26473, Rev. 03 6November 1, 2007
TEST PREPARATION
• When connecting the Isolation Module Tester to
the battery, connect the red clip to the
POSITIVE (+) terminal and the black clip to the
NEGATIVE (–) terminal. Connect the black clip
last. When disconnecting, disconnect it first.
• If an Isolation Module Tester lamp (tester lamps
are white, tester LEDs are green and slightly
smaller) does not come ON, the fault could be an
open lamp element, an open circuit, or both.
• All vehicle lamps must be operational. An open
lamp may cause false test results.
• The Isolation Module Tester is protected by a fuse
inside the tester that automatically resets itself. If
the fuse activates, disconnect power from the
Isolation Module Tester and wait several minutes.
Then resume the test.
ISOLATION MODULE TEST PROCEDURE – ALL MODULES
CAUTION
Read this document before testing any
snowplows.
ISOLATION MODULE ON-VEHICLE TEST
Set Up
Before connecting the Isolation Module Tester to the
Isolation Module, ensure the Isolation Module Tester
switches are in the following positions.
Connection
Connect the Isolation Module Tester to the Isolation
Module as follows:
1. Connect the Isolation Module Tester power cable
to a 12V power source by attaching the red
alligator clip to POSITIVE (+) and the black
alligator clip to NEGATIVE (–).
2. Connect the Adapter Cable (PN 26472) to the
Isolation Module Tester harness 2.
3. Connect the molded connector of the Adapter Cable
to the vehicle lighting harness connector located at
the grille of the vehicle. Isolation Module Tester
harnesses 1, 3 and 4 are not used for this test.
Test Procedure
1. Turn the vehicle's ignition ON, but do not start
engine. Verify the vehicle's lights function properly
by cycling the vehicle's park, turn, hazard, high
beams, low beams and DRL lamps. Then place
the vehicle's headlamp switch in the "low beam"
position. Turn OFF all vehicle lighting. Repair or
replace any defective vehicle lamps before
proceeding.
2. Turn the Isolation Module Tester POWER switch
to the "ON" position. Only the POWER indicator
should light.
Isolation Module Tester Switch Position
POWER OFF
PARK LAMPS OFF
HEADLAMPS LOW
PLOW ATTACHED NO
IGNITION SWITCH OFF
HEADLAMP COMMON NEG (–)
HIGH BEAM #2 OFF
DEDICATED DRL BULB SYSTEM OFF

Lit. No. 26473, Rev. 03 7November 1, 2007
ISOLATION MODULE TEST PROCEDURE – ALL MODULES
3. Turn ON the vehicle's parking lamps. Verify the
vehicle's parking lamps are ON.
4. Turn ON the vehicle's headlamps. Verify the
vehicle's low beams are ON.
5. Place the Isolation Module Tester PLOW
ATTACHED switch in the "ON" position. Verify the
vehicle's low beams go OFF and the following
Isolation Module Tester indicators are lit: PLOW
ATTACHED, plow PARK LIGHTS, and both plow
LOW BEAMs.
6. Place the vehicle's headlamps in the "high beam"
position. The Isolation Module Tester plow HIGH
BEAM indicators should light.
7. Turn ON the vehicle's left turn signal. Verify the
vehicle's left turn signal is functioning properly and
the Isolation Module Tester left TURN SIGNAL
indicator is lit. Turn OFF vehicle's left turn signal.
8. Turn ON the vehicle's right turn signal. Verify the
vehicle's right turn signal is functioning properly
and the Isolation Module Tester right TURN
SIGNAL indicator is lit. Turn OFF vehicle's right
turn signal.
9. Activate the vehicle's four-way flashers. Both the
vehicle's turn signal lamps and the Isolation
Module Tester TURN SIGNAL indicators should be
flashing. Turn OFF the vehicle's four-way flashers.
10. Place the Isolation Module Tester PLOW
ATTACHED switch in the "OFF" position. The
Isolation Module Tester HIGH BEAM, PARK LIGHTS
and PLOW ATTACHED indicators should go OFF
and the vehicle's high beams should be ON.
11. Place the vehicle in the DRL mode. Verify the
vehicle's DRLs are functioning properly.
NOTE: Due to the many DRL systems available, it is
the responsibility of the installer to fully understand
the operation of the system being tested.
12. Dedicated DRLs with a 26401, 27781 or 29070
Module: Place the Isolation Module Tester PLOW
ATTACHED switch in the "ON" position.
Depending on what module you have, the
following tester indicators should light:
26401 – HIGH BEAM (Dim)
27781 – LOW BEAM (Dim)
29070 – TURN SIGNAL
Low voltage DRLs with a 26400, 26401, 27781
or 29760-1 Module: Place the Isolation Module
Tester PLOW ATTACHED switch in the "ON"
position. The vehicle's DRLs should transfer to the
Isolation Module Tester. The Isolation Module
Tester mimics the vehicle's DRLs when the PLOW
ATTACHED switch is in the "ON" position.
13. Return the Isolation Module Tester PLOW
ATTACHED switch to the "OFF" position. Place
the Isolation Module Tester POWER switch in the
"OFF" position. Turn the vehicle's ignition OFF.
The vehicle portion of the test is complete. If the
system passes, remove the Isolation Module
Tester from the vehicle.
If the system fails the vehicle portion of the test,
remove the adapter cable (PN 26472) from the
Isolation Module Tester cable. Unplug the vehicle
lighting harness from position 2 (4-port) or
position A (3-port) of the Isolation Module. Connect the
Isolation Module Tester harness 2 to position 2 (4-port)
or position A (3-port) of the Isolation Module. Rerun
the vehicle portion of the test from the beginning to
determine if the vehicle lighting harness is functioning
properly. If it is, proceed to the module test section.

Lit. No. 26473, Rev. 03 8November 1, 2007
ISOLATION MODULE TEST PROCEDURE – 4-PORT MODULES
ISOLATION MODULE 26400 (WHITE
LABEL) OFF-VEHICLE TEST
Set-Up
Before connecting the Isolation Module Tester to the
Isolation Module, ensure the Isolation Module Tester
switches are in the following positions.
Connection
Connect the Isolation Module Tester to the Isolation
Module as follows:
1. Connect Isolation Module Tester cable 1 to
Isolation Module connector 1.
2. Connect Isolation Module Tester cable 2 to
Isolation Module connector 2.
3. Connect Isolation Module Tester cable 3 to
Isolation Module connector 3.
4. Connect Isolation Module Tester cable 4 to
Isolation Module connector 4.
5. Connect the Isolation Module Tester power cable
to a 12V power source by attaching the red
alligator clip to POSITIVE (+) and the black
alligator clip to NEGATIVE (–).
Test Vehicle Lights
1. Place the Isolation Module Tester POWER switch
in the "ON" position. The green POWER indicator
should light.
Isolation Module Tester Switch Position
POWER OFF
PARK LAMPS OFF
HEADLAMPS LOW
PLOW ATTACHED NO
IGNITION SWITCH OFF
HEADLAMP COMMON NEG (–)
HIGH BEAM #2 OFF
DEDICATED DRL BULB SYSTEM OFF
2. Place the PARK LAMP switch in the "ON" position.
The left and right side tester vehicle LOW BEAM
lamps should light.
3. Place the HEADLAMP COMMON switch in the
POS (+) position and listen for the "click" of the
configuration relay inside the Isolation Module
Tester. The LOW BEAM indicator flickers as the
relay changes state. Cycle the switch several
times to verify the relay is functioning properly.
Return the switch to the NEG (–) position.
4. Place the HEADLAMP switch in the "HIGH"
position. The tester vehicle HIGH BEAM indicators
should light.
5. Place the HIGH BEAM #2 switch in the "ON"
position. The tester vehicle HIGH BEAM and
HIGH BEAM #2 indicators should light. Release
the switch and only the HIGH BEAM indicators
should remain ON.
Test Snowplow Lights
1. Place the PLOW ATTACHED switch in the "ON"
position. The green PLOW ATTACHED indicator
should light and both plow HIGH BEAM indicators
and the plow PARK LIGHTS indicator should light.
2. Place the HEADLAMP switch in the "LOW"
position. The plow LOW BEAM indicators and
PARK LIGHTS should light.
3. Place the IGNITION SWITCH in the "ON" position.
The green IGNITION SWITCH and CONTROL
POWER indicators should light.
4. Press and hold the TURN SIGNAL switch in the
"LEFT" position. The plow left TURN SIGNAL
indicator should light. Release the switch.
5. Press and hold the TURN SIGNAL switch in the
"RIGHT" position. The plow right TURN SIGNAL
indicator should light. Release the switch.
The Isolation Module Test is complete. Turn Isolation
Module Tester OFF and disconnect Isolation Module.
Disconnect Isolation Module Tester from power source.

Lit. No. 26473, Rev. 03 9November 1, 2007
ISOLATION MODULE TEST PROCEDURE – 4-PORT MODULES
ISOLATION MODULE 27781 (GREEN
LABEL) OFF-VEHICLE TEST
Set-Up
Before connecting the Isolation Module Tester to the
Isolation Module, ensure the Isolation Module Tester
switches are in the following positions.
Connection
Connect the Isolation Module to the Isolation Module
Tester as follows:
1. Connect Isolation Module Tester cable 1 to
Isolation Module connector 1.
2. Connect Isolation Module Tester cable 2 to
Isolation Module connector 2.
3. Connect Isolation Module Tester cable 3 to
Isolation Module connector 3.
4. Connect Isolation Module Tester cable 4 to
Isolation Module connector 4.
5. Connect the Isolation Module Tester power cable
to a 12V power source by attaching the red
alligator clip to POSITIVE (+) and the black
alligator clip to NEGATIVE (–).
Test Vehicle Lights
1. Place the Isolation Module Tester POWER switch
in the "ON" position. The green POWER indicator
should light.
2. Place the PARK LAMP switch in the "ON" position.
The left and right side tester vehicle LOW BEAM
indicators should light.
3. Place the HEADLAMP switch in the "HIGH"
position. The tester vehicle HIGH BEAM indicators
should light.
Test Snowplow Lights
1. Place the PLOW ATTACHED switch in the "ON"
position. The green PLOW ATTACHED indicator
should light and both plow HIGH BEAM indicators
and the plow PARK LIGHTS indicator should light.
2. Place the HEADLAMP switch in the "LOW"
position. The plow LOW BEAM and PARK LIGHTS
indicators should now light.
3. Place the IGNITION SWITCH in the "ON" position.
The green IGNITION SWITCH and CONTROL
POWER indicators should light.
4. Press and hold the TURN SIGNAL switch in the
"LEFT" position. The plow left TURN SIGNAL
indicator should light. Release the switch.
5. Press and hold the TURN SIGNAL switch in the
"RIGHT" position. The plow right TURN SIGNAL
lamp should light. Release the switch.
6. Place the HEADLAMP switch in the "LOW"
position. The plow LOW BEAM indicators should
light.
7. Place the DEDICATED DRL BULB SYSTEM
switch in the "ON" position. The plow LOW BEAM
indicators should dim.
8. Return the DEDICATED DRL BULB SYSTEM
switch to the "OFF" position. The plow LOW
BEAM indicators should return to their full
brightness.
The Isolation Module Test is complete. Turn Isolation
Module Tester OFF and disconnect Isolation Module.
Disconnect Isolation Module Tester from power source.
Isolation Module Tester Switch Position
POWER OFF
PARK LAMPS OFF
HEADLAMPS LOW
PLOW ATTACHED NO
IGNITION SWITCH OFF
HEADLAMP COMMON NEG (–)
HIGH BEAM #2 OFF
DEDICATED DRL BULB SYSTEM OFF

Lit. No. 26473, Rev. 03 10 November 1, 2007
ISOLATION MODULE TEST PROCEDURE – 4-PORT MODULES
ISOLATION MODULE 26401 (YELLOW
LABEL) OFF-VEHICLE TEST
Set-Up
Before connecting the Isolation Module Tester to the
Isolation Module, ensure the Isolation Module Tester
switches are in the following positions.
Connection
Connect the Isolation Module Tester to module as
follows:
1. Connect Isolation Module Tester cable 1 to
Isolation Module connector 1.
2. Connect Isolation Module Tester cable 2 to
Isolation Module connector 2.
3. Connect Isolation Module Tester cable 3 to
Isolation Module connector 3.
4. Connect Isolation Module Tester cable 4 to
Isolation Module connector 4.
5. Connect the Isolation Module Tester power cable
to a 12V power source by attaching the red
alligator clip to POSITIVE (+) and the black
alligator clip to NEGATIVE (–).
Test Vehicle Lights
1. Place the Isolation Module Tester POWER switch
in the "ON" position. The green POWER indicator
should light.
2. Place the PARK LAMP switch in the "ON" position.
The left and right side tester vehicle LOW BEAM
indicators should light.
3. Place the HEADLAMP switch in the "HIGH"
position. The tester vehicle HIGH BEAM indicators
should light.
Test Snowplow Lights
1. Place the PLOW ATTACHED switch in the "ON"
position. The green PLOW ATTACHED indicator
should light and both plow HIGH BEAM indicators
and the plow PARK LIGHTS indicator should light.
2. Place the HEADLAMP switch in the "LOW"
position. The plow LOW BEAM and PARK LIGHTS
indicators should now light.
3. Place the IGNITION SWITCH in the "ON" position.
The green IGNITION SWITCH and CONTROL
POWER indicators should light.
4. Press and hold the TURN SIGNAL switch in the
"LEFT" position. The plow left TURN SIGNAL
indicator should light. Release the switch.
5. Press and hold the TURN SIGNAL switch in the
"RIGHT" position. The plow right TURN SIGNAL
lamp should light. Release the switch.
6. Place the HEADLAMP switch in the "HIGH"
position. The plow HIGH BEAM indicators should
light.
7. Place the DEDICATED DRL BULB SYSTEM
switch in the "ON" position. The plow HIGH BEAM
indicators should dim.
8. Return the DEDICATED DRL BULB SYSTEM
switch to the "OFF" position. The plow HIGH
BEAM indicators should return to their full
brightness.
The Isolation Module Test is complete. Turn Isolation
Module Tester OFF and disconnect Isolation Module.
Disconnect Isolation Module Tester from power source.
Isolation Module Tester Switch Position
POWER OFF
PARK LAMPS OFF
HEADLAMPS LOW
PLOW ATTACHED NO
IGNITION SWITCH OFF
HEADLAMP COMMON POS (+)
HIGH BEAM #2 OFF
DEDICATED DRL BULB SYSTEM OFF

Lit. No. 26473, Rev. 03 11 November 1, 2007
ISOLATION MODULE TEST PROCEDURE – 3-PORT MODULES
ISOLATION MODULE 29060 (WHITE
LABEL) OFF-VEHICLE TEST
Set-Up
Before connecting the Isolation Module Tester to the
Isolation Module, ensure the Isolation Module Tester
switches are in the following positions.
Connection – Requires Adapter 29294-1
Connect the Isolation Module Tester to the 29294-1
adapter and module as follows:
1. Connect Isolation Module Tester cable 1 to
adapter connector 1.
2. Connect Isolation Module Tester cable 2 to
Isolation Module connector A.
3. Connect Isolation Module Tester cable 3 to
adapter connector 3.
4. Connect adapter cable connector B to Isolation
Module connector B.
5. Connect Isolation Module Tester cable 4 to
adapter connector 4.
6. Connect adapter cable connector C to Isolation
Module connector C.
7. Connect the Isolation Module Tester power cable
to a 12V power source by attaching the red
alligator clip to POSITIVE (+) and the black
alligator clip to NEGATIVE (–).
Test Vehicle Lights
1. Place the Isolation Module Tester POWER switch
in the "ON" position. The green POWER indicator
should light.
2. Place the PARK LAMP switch in the "ON" position.
The left and right side tester vehicle LOW BEAM
lamps should light.
3. Place the HEADLAMP switch in the "HIGH"
position. The tester vehicle HIGH BEAM indicators
should light.
Test Snowplow Lights
1. Place the PLOW ATTACHED switch in the "ON"
position. The green PLOW ATTACHED indicator
should light and both plow HIGH BEAM indicators
and the plow PARK LIGHTS indicator should light.
2. Place the HEADLAMP switch in the "LOW"
position. The plow LOW BEAM indicators and
PARK LIGHTS should light.
3. Place the IGNITION SWITCH in the "ON" position.
The green IGNITION SWITCH and CONTROL
POWER indicators should light.
4. Press and hold the TURN SIGNAL switch in the
"LEFT" position. The plow left TURN SIGNAL
indicator should light. Release the switch.
5. Press and hold the TURN SIGNAL switch in the
"RIGHT" position. The plow right TURN SIGNAL
indicator should light. Release the switch.
The Isolation Module Test is complete. Turn Isolation
Module Tester OFF and disconnect Isolation Module.
Disconnect Isolation Module Tester from power source.
Isolation Module Tester Switch Position
POWER OFF
PARK LAMPS OFF
HEADLAMPS LOW
PLOW ATTACHED NO
IGNITION SWITCH OFF
HEADLAMP COMMON NEG (–)
HIGH BEAM #2 OFF
DEDICATED DRL BULB SYSTEM OFF

Lit. No. 26473, Rev. 03 12 November 1, 2007
ISOLATION MODULE TEST PROCEDURE – 3-PORT MODULES
ISOLATION MODULE 29070 (GREEN
LABEL) OFF-VEHICLE TEST
Set-Up
Before connecting the Isolation Module Tester to the
Isolation Module, ensure the Isolation Module Tester
switches are in the following positions.
Connection – Requires Adapter 29294-1
Connect the Isolation Module Tester to the 29294-1
adapter and module as follows:
1. Connect Isolation Module Tester cable 1 to
adapter connector 1.
2. Connect Isolation Module Tester cable 2 to
Isolation Module connector A.
3. Connect Isolation Module Tester cable 3 to
adapter connector 3.
4. Connect adapter cable connector B to Isolation
Module connector B.
5. Connect Isolation Module Tester cable 4 to
adapter connector 4.
6. Connect adapter cable connector C to Isolation
Module connector C.
7. Connect the Isolation Module Tester power cable
to a 12V power source by attaching the red
alligator clip to POSITIVE (+) and the black
alligator clip to NEGATIVE (–).
Test Vehicle Lights
1. Place the Isolation Module Tester POWER switch
in the "ON" position. The green POWER indicator
should light.
2. Place the PARK LAMP switch in the "ON" position.
The left and right side tester vehicle LOW BEAM
indicators should light.
3. Place the HEADLAMP switch in the "HIGH"
position. The tester vehicle HIGH BEAM indicators
should light.
Test Snowplow Lights
1. Place the PLOW ATTACHED switch in the "ON"
position. The green PLOW ATTACHED indicator
should light and both plow HIGH BEAM indicators
and the plow PARK LIGHTS indicator should light.
2. Place the HEADLAMP switch in the "LOW"
position. The plow LOW BEAM and PARK LIGHTS
indicators should now light.
3. Place the IGNITION SWITCH in the "ON" position.
The green IGNITION SWITCH and CONTROL
POWER indicators should light.
4. Press and hold the TURN SIGNAL switch in the
"LEFT" position. The plow left TURN SIGNAL
indicator should light. Release the switch.
5. Press and hold the TURN SIGNAL switch in the
"RIGHT" position. The plow right TURN SIGNAL
lamp should light. Release the switch.
6. Place the PARK LAMP switch in the "OFF"
position. The plow LOW BEAM and PARK LIGHTS
indicators should turn OFF.
7. Place the DEDICATED DRL BULB SYSTEM
switch in the "ON" position. The plow TURN
SIGNAL indicators should light.
8. Press and release the TURN SIGNAL switch in the
"LEFT" position. The plow left TURN SIGNAL
indicator should momentarily turn OFF then back ON.
9. Press and release the TURN SIGNAL switch in the
"RIGHT" position. The plow right TURN SIGNAL
indicator should momentarily turn OFF then back ON.
10. Return the DEDICATED DRL BULB SYSTEM
switch to the "OFF" position.
The Isolation Module Test is complete. Turn Isolation
Module Tester OFF and disconnect Isolation Module.
Disconnect Isolation Module Tester from power source.
Isolation Module Tester Switch Position
POWER OFF
PARK LAMPS OFF
HEADLAMPS LOW
PLOW ATTACHED NO
IGNITION SWITCH OFF
HEADLAMP COMMON NEG (–)
HIGH BEAM #2 OFF
DEDICATED DRL BULB SYSTEM OFF

Lit. No. 26473, Rev. 03 13 November 1, 2007
ISOLATION MODULE TEST PROCEDURE – 3-PORT MODULES
ISOLATION MODULE 29760 AND 29760-1
(BLUE LABEL) OFF-VEHICLE TEST
Set-Up
Before connecting the Isolation Module Tester to the
Isolation Module, ensure the Isolation Module Tester
switches are in the following positions.
Connection – Requires Adapter 29294-1
Connect the Isolation Module Tester to the 29294-1
adapter and module as follows:
1. Connect Isolation Module Tester cable 1 to
adapter connector 1.
2. Connect Isolation Module Tester cable 2 to
Isolation Module connector A.
3. Connect Isolation Module Tester cable 3 to
adapter connector 3.
4. Connect adapter cable connector B to Isolation
Module connector B.
5. Connect Isolation Module Tester cable 4 to
adapter connector 4.
6. Connect adapter cable connector C to Isolation
Module connector C.
7. Connect the Isolation Module Tester power cable
to a 12V power source by attaching the red
alligator clip to POSITIVE (+) and the black
alligator clip to NEGATIVE (–).
Test Vehicle Lights
1. Place the Isolation Module Tester POWER switch
in the "ON" position. The green POWER indicator
should light.
2. Place the PARK LAMP switch in the "ON" position.
The left and right side tester vehicle LOW BEAM
lamps should light.
3. Place the HEADLAMP switch in the "HIGH"
position. The tester vehicle HIGH BEAM indicators
should light.
Test Snowplow Lights
1. Place the PLOW ATTACHED switch in the "ON"
position. The green PLOW ATTACHED indicator
should light and both plow HIGH BEAM indicators
and the plow PARK LIGHTS indicator should light.
2. Place the HEADLAMP switch in the "LOW"
position. The plow LOW BEAM and PARK LIGHTS
indicators should light.
3. Place the IGNITION SWITCH in the "ON" position.
The green IGNITION SWITCH and CONTROL
POWER indicators should light.
4. Press and hold the TURN SIGNAL switch in the
"LEFT" position. The plow left TURN SIGNAL
indicator should light. Release the switch.
5. Press and hold the TURN SIGNAL switch in the
"RIGHT" position. The plow right TURN SIGNAL
indicator should light. Release the switch.
6. 29760-1 Module only: Place the PARK LAMP and
IGNITION SWITCH in the "OFF" position. The
IGNITION SWITCH and CONTROL POWER
indicators should turn OFF. Listen for the "click" of
the configuration relay inside the Isolation Module
Tester. Cycle the IGNITION SWITCH several
times to verify the relay is functioning properly.
Place the IGNITION SWITCH in the "OFF"
position and cycle the PARK LAMP switch several
times to verify the relay is functioning properly.
Place the PARK LAMP switch in the "ON" position.
The plow LOW BEAM and PARK LIGHTS
indicators should be ON. Listen for the "click" of
the configuration relay inside the Isolation Module
Tester. Cycle the PARK LAMP switch several
times to verify the relay is functioning properly.
The Isolation Module Test is complete. Turn Isolation
Module Tester OFF and disconnect Isolation Module.
Disconnect Isolation Module Tester from power source.
Isolation Module Tester Switch Position
POWER OFF
PARK LAMPS OFF
HEADLAMPS LOW
PLOW ATTACHED NO
IGNITION SWITCH OFF
HEADLAMP COMMON NEG (–)
HIGH BEAM #2 OFF
DEDICATED DRL BULB SYSTEM OFF

Lit. No. 26473, Rev. 03 14 November 1, 2007
The company reserves the right under its product improvement policy to change construction or design details and furnish equipment when so
altered without reference to illustrations or specifications used. This equipment manufacturer or the vehicle manufacturer may require or recom-
mend optional equipment for snow removal. Do not exceed vehicle ratings with a snowplow. The company offers a limited warranty for all
snowplows and accessories. See separately printed page for this important information.
Printed in U.S.A.