Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Exterior Lights 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 | Verify that the park, license and tail lamps are inoperative. Do the park, license and tail lamps operate normally? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 | Are all park, license, and tail lamps inoperative? | Go to Step 6 | Go to Step 4 |
4 | Test the supply circuit of the inoperative lamp for high resistance or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 5 |
5 | Test the ground circuit of the inoperative lamp for high resistance or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 11 |
6 |
Does the scan tool display On? | Go to Step 12 | Go to Step 7 |
7 | Use the scan tool to monitor the BCM park lamp switch input data. Does the scan tool display Active? | Go to Step 10 | Go to Step 8 |
8 | Test for an open or high resistance in the park lamp switch signal circuit. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 9 |
9 | Inspect for poor connections at the harness connector of 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 15 | Go to Step 13 |
10 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 15 | Go to Step 14 |
11 | Replace the inoperative bulb. Did you complete the replacement? | Go to Step 15 | -- |
12 | Replace the park lamp relay. Refer to Relay Replacement . Did you complete the repair? | Go to Step 15 | -- |
13 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the repair? | Go to Step 15 | -- |
14 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 15 | -- |
15 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
