Park, License and Tail Lamps Inoperative
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Park, License and Tail Lamps Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 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 voltage 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 19 | 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 19 | Go to Step 15 |
| 6 | The PK LP relay is located on the reverse side of the I/P fuse block.
Do the park lamps illuminate? |
Go to Step 7 | Go to Step 14 |
| 7 |
|
Go to Step 9 | Go to Step 8 |
| 8 | Test for a poor connection or a short to battery positive voltage open in the park lamp relay control circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 19 | Go to Step 16 |
| 9 |
|
Go to Step 10 | Go to Step 12 |
| 10 | Test for a short to ground in the exterior lamps OFF input circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 19 | Go to Step 11 |
| 11 | Inspect for poor connections at the harness connector of the multifunction turn signal switch. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 19 | Go to Step 17 |
| 12 | Test for a poor connection, an open or a short to battery positive in the park lamp switch on the signal circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 19 | Go to Step 13 |
| 13 | Inspect for poor connections at the harness connector of the BCM. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 19 | Go to Step 18 |
| 14 | Repair a short to ground, an open or a poor connection in the park lamp supply voltage circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you complete the repair? |
Go to Step 19 | - |
| 15 | Replace the inoperative bulb. Did you complete the replacement? |
Go to Step 19 | - |
| 16 | Replace the PK LP relay. Refer to Relay Replacement (Within an Electrical Center)
or Relay Replacement (Attached to Wire Harness)
. Did you complete the repair? |
Go to Step 19 | - |
| 17 | Replace the lamp switch assembly. Refer to Headlamp Switch Replacement . Did you complete the repair? |
Go to Step 19 | - |
| 18 | Replace the BCM. Refer to Control Module References
for replacement, setup and programming. Did you complete the replacement? |
Go to Step 19 | - |
| 19 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |