Red Brake Warning Indicator

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

The red brake warning indicator alerts the driver to certain conditions that exist in the brake system. The instrument cluster performs a bulb check when the ignition key is turned to the RUN position. The conditions that cause the indicator to illuminate are low brake fluid level, the parking brake is applied or there is a fault in the ABS module (if the yellow ABS warning indicator is also illuminated). The brake fluid level switch is part of the brake fluid reservoir and is wired directly to the smart junction box (SJB), when the fluid is below the predetermined level, the SJB sends a message to the instrument cluster along the high speed communication area network (HS-CAN) bus to illuminate the indicator. The parking brake switch is mounted on the parking brake control and is wired to the SJB. When the parking brake is engaged, the SJB sends a message to the instrument cluster along the HS-CAN bus to illuminate the indicator. When there is one or more DTCs in the ABS module, the module sends a message to the instrument cluster along the HS-CAN bus to illuminate the red brake warning indicator and the yellow ABS warning indicator.