Step | Action | 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 | Place the headlamp switch in the HEAD position. Do the headlamps illuminate? | Go to Step 3 | |
3 |
Do the headlamps illuminate? | Go to Step 4 | Go to Step 5 |
4 | Do the park lamps illuminate? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Park Lamps Inoperative |
5 | Do the park lamps illuminate? | Go to Step 6 | Go to Step 7 |
6 | Test for a open or high resistance in the automatic headlamp control circuit of the automatic headlamp control module. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 23 |
7 |
Did the test lamp illuminate for both tests? | Go to Step 8 | Go to Step 16 |
8 | Check the AUTO HEAD LAMP fuse for an open. Is the AUTO HEAD LAMP fuse open? | Go to Step 17 | Go to Step 9 |
9 | Probe the ignition 1 voltage circuit of the automatic headlamp control module connector with a test lamp that is connected to a good ground. Did the test lamp illuminate? | Go to Step 18 | Go to Step 10 |
10 | Probe the ignition 3 voltage circuit of the automatic headlamp control module connector with a test lamp that is connected to a good ground. Did the test lamp illuminate? | Go to Step 19 | Go to Step 11 |
11 | Probe the ground circuit of the automatic headlamp control module connector with a test lamp that is connected to a battery voltage. Did the test lamp illuminate? | Go to Step 20 | Go to Step 12 |
12 | Is the park brake indicator in the Instrument Panel Cluster (IPC) ON? | Go to Step 14 | Go to Step 13 |
13 |
Do the headlamps illuminate? | Go to Step 21 | Go to Step 15 |
14 | Test for a short to ground in the DRL park brake ON signal. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 22 |
15 | Test for an open, high resistance, short to voltage in the ambient light sensor input circuit of the automatic headlamp control module. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 23 |
16 | Repair an open or high resistance in the affected battery positive voltage circuit of the automatic headlamp control module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | -- |
17 | Repair an short to ground in the ignition 1 voltage circuit of the automatic headlamp control module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | -- |
18 | Repair a open or high resistance in the ignition 1 voltage circuit of the automatic headlamp control module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | -- |
19 | Repair a open or high resistance in the ignition 3 voltage circuit of the automatic headlamp control module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | -- |
20 | Repair a open or high resistance in the ground circuit of the automatic headlamp control module. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | -- |
21 | Replace the ambient light sensor. Refer to Ambient Light Sensor Replacement Did you complete the replacement? | Go to Step 24 | -- |
22 | Replace the park brake indicator switch. Refer to Parking Brake Indicator Switch Replacement in Brakes Did you complete the replacement? | Go to Step 24 | -- |
23 | Replace the automatic headlamp control module. Refer to Headlamp Control Module Replacement Did you complete the replacement? | Go to Step 24 | -- |
24 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
