Without Daytime Running Lights
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The brake warning indicator illuminates when the when one or more of the following occurs:
- The Electronic Brake Control Module (EBCM) performs the bulb check. The EBCM applies ground to the Anti-Lock Brake System (ABS) pressure differential sensor signal circuit.
- The brake pressure differential switch is closed by a pressure differential between the front and rear brake circuits. The brake pressure differential switch applies ground to the ABS pressure differential sensor signal circuit.
- The park brake is engaged. The park brake warning switch applies ground to the brake warning indicator control circuit.