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Diagnostic Aids

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.

Perform a visual inspection for loose or poor connections at all related components. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

DTC B2545

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
  1. Install a scan tool.
  2. Turn the ignition to the ON position, with the engine OFF.
  3. With a scan tool, select light test and command the backup lamps ON and OFF.
Do the backup lamps turn ON and OFF with each command?		 Go to Diagnostic Aids Go to Step 3 
3 Test the backup lamps voltage supply circuit for a short to ground or an open. Refer to Circuit Testing and to Wiring Repairs .
Did you find and correct the condition?		 Go to Step 6  Go to Step 4 
4 Test the CHMSL/Bkup fused voltage supply circuit to the BCM for a short ground or an open. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 6  Go to Step 5 
5 Replace the body control module (BCM). Refer to Control Module References for replacement, setup and programming.
Did you complete the replacement?		 Go to Step 6  -
6
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC.
Does the DTC reset?		 Go to Step 2  System OK
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