Code 88 - Red Brake Warning Light Circuit Shorted To Battery: Notes
This test isolates a short to battery between EBCM and Red BRAKE warning light or an open driver circuit that does not allow Red BRAKE warning light to be illuminated by EBCM. This will only occur if an ABS fault is detected that may degrade base brake operation.
Code 88 can set only at beginning of 3 second bulb check if EBCM detects battery voltage on BRAKE warning light control circuit. Code will be stored but ABS will not be disabled.
NOTE:
Test numbers refer to numbers on diagnostic chart. Use only 10-megohm (minimum) DVOM for all voltage and resistance tests.
- Identifies if ground circuit to BRAKE warning light is being completed by a source other than the EBCM.
- Identifies if malfunction is currently present.
- This test indicates if voltage is being supplied from a source other than power supply from fuse block.
- Ensures malfunction was not due to physical damage of circuitry.
- This step checks if Code 86 is also set.