Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics | |||
1 | Did you perform the Lighting Systems Diagnostic System Check? | Go to Step 2 | |
2 | Verify that the low beam headlamps are inoperative. Do the low beam headlamps operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Is only one low beam headlamp inoperative? | Go to Step 4 | Go to Step 5 |
4 |
Did you complete the repair? | Go to Step 19 | -- |
5 | Does the wiper activated headlamp (WAH) function of the wiper system operate normally? | Go to Step 8 | Go to Step 6 |
6 |
Does the scan tool display Yes after approximately 3 cycles of the wiper blades? | Go to Step 14 | Go to Step 7 |
7 | Test the windshield wiper switch signal 2 circuit for an open, high resistance, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct a condition? | Go to Step 19 | Go to Step 13 |
8 | Test the headlamp switch signal and ground circuits for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct a condition? | Go to Step 19 | Go to Step 9 |
9 |
Do the low beam headlamps illuminate? | Go to Step 12 | Go to Step 10 |
10 | Connect a fused jumper from ground to the headlamp driver module control circuit terminal at the headlamp driver module (HDM) in the underhood fuse block. Do the low beam headlamps illuminate? | Go to Step 14 | Go to Step 11 |
11 | Test the headlamp driver module ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct a condition? | Go to Step 19 | Go to Step 17 |
12 | Inspect for poor connections at the harness connector of the headlamp switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 19 | Go to Step 18 |
13 | Inspect for poor connections at the harness connector of the wiper motor cover. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 19 | Go to Step 15 |
14 | Inspect for poor connections at the harness connector of the Body Control Module (BCM). Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 19 | Go to Step 16 |
15 | Replace the wiper motor cover. Refer to Wiper Motor Cover Replacement in Wipers/Washers Systems. Did you complete the repair? | Go to Step 19 | -- |
16 |
Important: Perform the setup procedure for the BCM. Replace the body control module (BCM). Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 19 | -- |
17 | Replace the headlamp driver module (HDM). Refer to Headlamp Driver Module Relay Replacement . Did you complete the repair? | Go to Step 19 | -- |
18 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the repair? | Go to Step 19 | -- |
19 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |