Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Lighting Systems Connector End Views or Data Communication Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 |
Does the headlamp system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 | Are both high and low beam headlamps inoperative? | Go to Step 4 | Go to Headlamps Inoperative - Low Beams or |
4 | With a scan tool, observe the headlamp switch data parameter in the body control module (BCM) data list. Does the scan tool indicate ACTIVE? | Go to Step 7 | Go to Step 5 |
5 | Connect a test lamp between the ground circuit of the headlamp switch connector and battery positive voltage. Does the test lamp illuminate? | Go to Step 6 | Go to Step 9 |
6 | Test the headlamps switch headlamps on signal circuit of the headlamp switch for a high resistance, an open, or a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 12 | Go to Step 8 |
7 | Inspect for poor connections to the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 12 | Go to Step 10 |
8 | Inspect for poor connections to the headlamp switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 12 | Go to Step 11 |
9 | Repair the ground circuit of the headlamp switch. Refer to Wiring Repairs . Did you complete the repair? | Go to Step 12 | -- |
10 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 12 | -- |
11 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? | 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 |
