Stop Lamps Always On
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Stop Lamps Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems DEFINITION: The CHMSL lamps are on at all times. |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Ensure that the brake pedal is not depressed. Are the stop lamps OFF? |
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Disconnect the body control module (BCM) connector C2. Does CHMSL stay illuminated? |
Go to Step 5 | Go to Step 4 |
| 4 | Test for a poor connection or an open in the brake pedal position switch low reference circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 7 | Go to Step 6 |
| 5 | Repair a short to battery positive voltage in the stop lamp voltage supply circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 7 | - |
| 6 | 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 7 | - |
| 7 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |