Park, License and Tail Lamps Always On
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
Park, License and Tail Lamps Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems. |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 |
|
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Using a scan tool, command the park lamps ON and OFF. Do the park lamps turn off as expected? |
Go to Step 4 | Go to Step 5 |
| 4 | Disconnect the headlamp switch connector. Are the park lamps illuminated? |
Go to Step 8 | Go to Step 6 |
| 5 | Test the park lamp supply voltage circuit for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 11 | Go to Step 7 |
| 6 | Inspect for poor connections at the harness connector of the headlamp switch. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 11 | Go to Step 9 |
| 7 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 11 | Go to Step 10 |
| 8 | Repair a short to ground in the park lamp switch ON signal circuit of the headlamp switch. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 11 | - |
| 9 | Replace the headlamp switch. Refer to Headlamp Switch Replacement . Did you complete the replacement? |
Go to Step 11 | - |
| 10 | Replace the BCM. Refer to Control Module References
in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? |
Go to Step 11 | - |
| 11 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |