Snowplow Headlamps - Western HTS Mechanic's Manual

TROUBLESHOOTING GUIDE

SNOWPLOW HEADLAMPS

Incorrect Operation or No Headlamps
BASIC CHECK QUESTIONS
1 DRL mode/automatic headlamp function correctly
2 Harnesses connected between vehicle and snowplow (all)
3 Harness connectors clean / not corroded
4 Ignition on
5 Control powers up with key on
6 Correct isolation module kit installed for application
7 OEM lights operating correctly prior to installation
8 OEM fuse tests good
9 Bulb burned out
10 Plugged into OEM headlamp correctly
Harnesses in correct location at isolation module and installed per
11
installation instructions
12 Harnesses confi gured correctly for HB-1/HB-5 and/or kits using adapters Install using isolation module instructions.
Confi guration plug correct
13
(only required on 4-port module)
14 Correct harnesses and/or isolation module
15 Harness wired per drawing
16 Verify power and ground in proper pin locations at isolation module
17 Verify power and ground in proper pin locations to vehicle headlamp
18 Isolation module operating correctly
Lit. No. 41467, Rev. 01
SOLUTIONS
Fully understand OEM headlamp operation; refer to vehicle owner's manual.
Harnesses must be connected for all snowplow and headlamp functions.
Replace as needed.
Ignition switch or vehicle park lights must be ON for snowplow headlamps to operate.
Go to Control/Cable/Plow Module Test.
Verify per Quick Match at www.westernplows.com.
OEM headlamps must be fully operational for correct isolation module operation.
Replace with proper fuse.
Replace with proper bulb.
Connect per isolation module instructions.
Install using isolation module instructions.
Refer to isolation module instructions.
Refer to isolation module parts list.
See electrical schematics in this guide.
See electrical schematics in this guide.
See electrical schematics in this guide.
Test using instructions supplied with tester.
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April 15, 2021