Headlamps Inoperative in Low Light Conditions Chev Domestic, Gulf, Pontiac Canadian
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics | |||
1 | Did you review the Exterior Lighting System Description and Operation and perform the necessary inspections? | Go to Step 2 | |
2 |
Do the headlamps illuminate? | Go to Step 3 | |
3 |
Do the headlamps illuminate? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 4 |
4 | Are the park lamps illuminated? | Go to Step 7 | Go to Step 5 |
5 | Is the park brake indicator in the instrument panel cluster (IPC) ON? | Go to Brake Warning Indicator Always On in Hydraulic Brakes | Go to Step 6 |
6 | Are the DRL lamps illuminated? | Go to Step 13 | Go to Step 8 |
7 |
Does the test lamp illuminate? | Go to Step 11 | Go to Step 12 |
8 |
Does the test lamp illuminate? | Go to Step 9 | Go to Step 17 |
9 | Probe the ignition voltage 3 circuit of the DRL control module connector with a test lamp that is connected to ground. Does the test lamp illuminate? | Go to Step 10 | Go to Step 18 |
10 | Probe the ground circuit of the DRL control module connector with a test lamp that is connected to battery voltage. Does the test lamp illuminate? | Go to Step 15 | Go to Step 19 |
11 | Connect a fused jumper between the headlamp relay supply voltage circuit and the headlamp switch signal circuit of the DRL control module connector. Do the headlamps illuminate? | Go to Step 15 | Go to Step 16 |
12 | Test for an open or high resistance in the headlamp relay supply voltage circuit of the DRL control module connector. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 14 |
13 | Replace the ambient light sensor and operate the system . Refer to Daytime Running Lamp (DRL) Ambient Light Sensor Replacement . Do the automatic headlamps operate properly? | Go to Step 22 | Go to Step 15 |
14 | Inspect for poor connections at the headlamp switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 20 |
15 | Inspect for poor connections at the daytime running lamps (DRL) control module Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 21 |
16 | Repair an open or high resistance in the headlamp switch signal circuit of the DRL control module connector. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 22 | -- |
17 | Repair an open or high resistance in the ignition voltage 1 circuit of the DRL control module connector. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 22 | -- |
18 | Repair an open or high resistance in the ignition voltage 3 circuit of the DRL control module connector. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 22 | -- |
19 | Repair an open or high resistance in the ground circuit of the DRL control module connector. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 22 | -- |
20 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? | Go to Step 22 | -- |
21 | Replace the daytime running lamps (DRL) control module. Refer to Daytime Running Lights (DRL) Control Module Replacement Did you complete the replacement? | Go to Step 22 | -- |
22 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
