Pinpoint Test 16: The Brake Warning Indicator Is Never On

PINPOINT TEST 16: THE BRAKE WARNING INDICATOR IS NEVER ON

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 illuminates the brake warning indicator.

- DTC C1226 (ABS Warning Lamp Output Circuit Short to Ground) - sets if the instrument cluster detects a short to ground on circuit (G/V) during the instrument cluster initiation and bulb check.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Brake fluid level switch
- Parking brake switch
- ABS module
- Instrument cluster

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

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