Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views or Body Control System Connector End Views in Body Control System | |||
1 | Did you perform the Lighting Systems Diagnostic System Check? | 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 in Wiring Systems | 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 in Wiring Systems. 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 in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 11 |
6 |
Is a ground signal present? | Go to Step 12 | Go to Step 7 |
7 | Use the scan tool to view the body control module (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 in Wiring Systems. 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 Circuit Testing and Wiring Repairs in Wiring Systems. 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 body control module (BCM). Refer to Circuit Testing and Wiring Repairs in Wiring Systems. 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 in Wiring Systems. 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 |
Important: Perform the setup procedure for the BCM. Replace BCM. Refer to Body Control Module Replacement in Body Control System. 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 |
