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 high or low beam headlamps are always on. Do the high and low beam headlamps operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||
3 | Does the wiper activated headlamp (WAH) function of the wiper system operate normally? | Go to Step 6 | Go to Step 4 | ||||
4 | With the key in RUN and the wiper switch in the OFF position, use the scan tool to monitor the Front Wipers Active input parameter. Does the scan tool parameter display NO? | Go to Step 14 | Go to Step 5 | ||||
5 | Test the windshield wiper switch signal 2 circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 17 | ||||
6 | Are only the high beam headlamps always on? | Go to Step 7 | Go to Step 11 | ||||
7 | Disconnect the headlamp dimmer switch. Do the high beam headlamps remain always on? | Go to Step 8 | Go to Step 13 | ||||
8 | Test the following circuits for a short to ground as applicable. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct a condition? | Go to Step 22 | Go to Step 9 | ||||
9 | Remove the high beam relay. Do the high beam headlamps remain always on? | Go to Step 15 | Go to Step 10 | ||||
10 | Test for a ground signal at the high beam relay control circuit connector terminal. Refer to Circuit Testing in Wiring Systems. Is a ground control signal present? | Go to Step 14 | Go to Step 19 | ||||
11 | Remove the headlamp driver module (HDM). Do the low beam headlamps remain always on? | Go to Step 16 | Go to Step 12 | ||||
12 | Test for a voltage signal at the headlamp low beam relay control circuit connector terminal. Refer to Circuit Testing in Wiring Systems. Is a voltage control signal present? | Go to Step 14 | Go to Step 20 | ||||
13 | Inspect for poor connections at the harness connector of the headlamp dimmer switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 21 | ||||
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 22 | Go to Step 18 | ||||
15 | Repair the short to voltage in the right or left high beam headlamp supply voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you find and correct a condition? | Go to Step 22 | -- | ||||
16 | Repair the short to voltage in the right or left low beam headlamp supply voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you find and correct a condition? | Go to Step 22 | -- | ||||
17 | Replace the wiper motor cover. Refer to Wiper Motor Cover Replacement in Wipers/Washers Systems. Did you complete the repair? | Go to Step 22 | -- | ||||
18 |
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 22 | -- | ||||
19 | Replace the high beam headlamp relay. Refer to High Beam Relay Replacement . Did you complete the repair? | Go to Step 22 | -- | ||||
20 | Replace the headlamp driver module (HDM). Refer to Headlamp Driver Module Relay Replacement . Did you complete the repair? | Go to Step 22 | -- | ||||
21 | Replace the headlamp dimmer switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement in Steering Wheel and Column. Did you complete the repair? | Go to Step 22 | -- | ||||
22 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 | ||||
