Test L: The Brake Warning Indicator Is Never/Always on

PINPOINT TEST L: THE BRAKE WARNING INDICATOR IS NEVER/ALWAYS ON

L1-L5:

L5-L7:

L8-L10:

L10-L11:

L12-L15:

Normal Operation
The instrument cluster uses 2 separate strategies to operate the brake warning indicator. When the parking brake is applied, circuit 162 (LG/RD) to the instrument cluster is grounded by the parking brake switch through circuit 1203 (BK/LB). The instrument cluster receives the ground signal and illuminates the brake warning indicator. When the brake fluid level is low or a base brake system concern is detected, the anti-lock brake system (ABS) module sends a signal to the instrument cluster over the communication network to illuminate the brake system warning indicator.

Possible Causes
- circuit 162 (LG/RD) open or short to ground
- circuit 512 (TN/LG) open or short to ground
- circuit 977 (VT/WH) open or short to ground
- circuit 1203 (BK/LB) open
- circuit 1205 (BK) open
- parking brake switch
- brake fluid level switch
- ABS module
- instrument cluster