Test K: The Brake Warning Indicator Is Always On

PINPOINT TEST K: THE BRAKE WARNING INDICATOR IS ALWAYS ON

K1-K3:

K3-K5:

K5-K6:

K7-K10:

Normal Operation
The instrument cluster uses 3 strategies to operate the brake warning indicator; parking brake status, brake fluid level, and the base brake system integrity. When the parking brake is applied, circuit 162 (LG/RD) to the instrument cluster is grounded by the parking brake switch through circuit 57 (BK). The instrument cluster receives the ground signal and illuminates the brake warning indicator. When the brake fluid level switch is disconnected, or the brake fluid level is low, the instrument cluster receives the data from circuits 512 (TN/LG) and 531 (DG/YE) and illuminates the brake warning indicator.

DTC B2982 - is an on-demand DTC that sets if the instrument cluster detects a short to ground on the parking brake input, circuit 162 (LG/RD).

NOTE: The brake fluid level switch is part of the master cylinder and is not installed separately.

Possible Causes
- Circuit 162 (LG/RD) short to ground
- Circuit 512 (TN/LG) open or short to ground
- Circuit 531 (DG/YE) open or short to ground
- Parking brake switch
- Brake fluid level switch (part of the master cylinder)
- Anti-lock brake system (ABS) module
- Instrument cluster