Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics | ||||
1 | Did you perform the Lighting System Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Do the low and high beam headlamps remain off? | -- | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 | Remove the headlamp relay. Do the headlamps turn off? | -- | Go to Step 8 | Go to Step 4 |
4 | Disconnect the headlamp switch. DO the headlamps turn off? | -- | Go to Step 5 | Go to Step 6 |
5 | Test for a short to ground in the headlamp switch signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 13 |
6 | Disconnect the underhood fuse block connector C2. Do the headlamps turn off? | -- | Go to Step 11 | Go to Step 7 |
7 |
Do all of the headlamps turn off? | -- | Go to Step 14 | Go to Step 12 |
8 |
Do all of the headlamps turn off? | -- | Go to Step 10 | Go to Step 9 |
9 | Test for a short to ground in the headlamp relay control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 15 |
10 |
Does the scan tool indicate that the ambient light sensor input parameter is within the specified range? | 0.5-2.5 Volts | Go to Step 17 | Go to Step 16 |
11 | Repair a short to ground in the headlamp signal circuit between connector C2 of the underhood fuse block and C201. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 18 | -- |
12 | Repair a short to ground in the illuminated headlamp signal circuit Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 18 | -- |
13 | Replace the headlamp switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle in Steering Wheel and Column. Did you complete the repair? | -- | Go to Step 18 | -- |
14 | Replace the underhood fuse block. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems. Did you complete the repair? | -- | Go to Step 18 | -- |
15 | Replace the headlamp relay. Refer to Relay Replacement in Wiring Systems. Did you complete the repair? | -- | Go to Step 18 | -- |
16 | Replace the ambient light sensor. Refer to Daytime Running Lamp (DRL) Ambient Light Sensor Replacement Did you complete the repair? | -- | Go to Step 18 | -- |
17 |
Important: Perform the set up procedures for the body control module. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System. Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Did you complete the repair? | -- | Go to Step 18 | -- |
18 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
