OEM Cadillac XLR Brake Light Switch

Cadillac XLR Brake Light Switch Parts Questions & Experts Answers

• Clutch Switch
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  Q: How to calibrate the Brake Light Switch after servicing on Cadillac XLR?

  A: After working on the brake pedal position sensor or bcm you need to calibrate the system but never press the brake pedal during this procedure because any movement will break the test and force you to repeat the process. Start the procedure with the parking brake fully engaged and the transmission in park mode for automatic transmissions and neutral position for manuals. Start the scan tool (J-46079) to erase all Body Control Module fault codes before turning on the ignition with engine off. From the main menu select vehicle control systems to reach computer/integrating systems then module setup before choosing bcm. Choose bpp sensor calibration from the screen options to run sensor setup that sets proper readings for the brake pedal position sensor on the bcm so it works with vehicle components through class 2 bus communication.