Fisher HT Series - Troubleshooting: Vehicle Headlamps; Headlamp Operation Troubleshooting

Lit. No. 41298, Rev. 01 February 15, 2019
57
TROUBLESHOOTING
VEHICLE HEADLAMPS
Incorrect Operation or No Headlamps
BASIC CHECKS
SOLUTIONS
1 DRL mode/automatic headlamp function. Fully understand OEM headlamp operation; refer to vehicle owner's manual.
2 Correct Isolation Module kit installed for application. Verify per eMatch at www.fi sherplows.com.
3 OEM lights operating correctly prior to installation. OEM headlamps must be fully operational for correct Isolation Module operation.
4 OEM fuse tests good. Replace with proper fuse.
5 OEM headlamp bulb operational. Replace with proper bulb.
6 Plugged into OEM headlamp correctly. Connect per Isolation Module instructions.
7
Harnesses in correct location at Isolation Module and installed per
installation instructions.
Install using Isolation Module instructions.
8 Harnesses confi gured correctly for HB-1/HB-5 and/or kits using adapters. Install using Isolation Module instructions.
9
Confi guration plug correct
(only required on certain 4-Port Module installations).
Refer to Isolation Module instructions.
10 Correct harnesses and/or Isolation Module in kit. Refer to Isolation Module parts list.
11 Harness wired per drawing. See electrical schematics in this guide.
12 Verify power and ground in proper pin locations at Isolation Module. See electrical schematics in this guide.
13 Verify power and ground in proper pin locations to vehicle headlamp. See electrical schematics in this guide.
14 Test Isolation Module with Isolation Module tester. Test using instructions supplied with tester.