Headlamps Inoperative in Low Light Conditions Pontiac, Chevy Dom, Gulf States
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Do the headlamps illuminate? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the test lamp illuminate? | -- | Go to Step 4 | Go to Step 10 |
4 | Connect a fused jumper between the DRL module connector C1 terminal F (headlamp) or H (parklamp) and D (headlamp) or A (parklamp). Do the headlamps turn on? | -- | Go to Step 6 | Go to Step 7 |
5 | Inspect for an open in the supply voltage circuit of the headlamp relay switch between the headlamp switch and the DRL module. Refer to Circuit Testing in Wiring Systems. Does an open exist? | -- | Go to Step 8 | Go to Step 9 |
6 | Replace the DRL module. Refer to Daytime Running Lights (DRL) Control Module Replacement . Did you complete the replacement? | -- | Go to Step 12 | -- |
7 | Repair a poor connection or an open in the supply voltage circuit of the headlamp dimmer switch or the supply voltage circuit of the park lamps. Refer to Wiring Repairs or Connector Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 12 | -- |
8 | Repair a poor connection or an open in the supply voltage circuit of the headlamp relay switch. Refer to Wiring Repairs or Connector Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 12 | -- |
9 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? | -- | Go to Step 12 | -- |
10 | Are the inoperative lamps the headlamps and not the park lamps? | -- | Go to Step 5 | Go to Step 11 |
11 | Repair a poor connection or an open in the battery positive voltage circuit of the park lamp relay. Refer to Wiring Repairs or Connector Repairs in Wiring System Did you complete the repair? | -- | Go to Step 12 | -- |
12 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
