Pinpoint Test 16

PINPOINT TEST 16: BRAKE WARNING INDICATOR IS NEVER ON

Step 4-Step 6:

Step 1-Step 4:

Step 5-Step 9:

Step 10-Step 11:

Normal Operation
The brake warning light is used to indicate low fluid level (base brake system concern) or a parking brake that is not fully released. The instrument cluster is hardwired to the parking brake switch through circuit (GY/L) for parking brake status. The instrument cluster is hardwired to the anti-lock brake system (ABS) module through the electronic brake distribution (EBD) line, circuit (G/V), for brake fluid level concerns. When the parking brake is applied, the instrument cluster receives a ground and turns on the brake warning indicator. When brake fluid is low or the ABS module detects a base brake system concern, the ABS module sends the instrument cluster a signal through the EBD line and the instrument cluster turns on the brake warning indicator.

Possible Causes
- Circuit (G/V) short to ground
- Circuit (GY/L) open
- Circuit (B/Y) open
- Circuit (B/L) open
- Brake fluid level switch
- Parking brake switch
- ABS module
- Instrument cluster

CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.