DTC 88

DTC 88 Red Brake Warning Lamp Circuit Shorted To Battery:

Red Brake Warning Lamp Circuit:

CIRCUIT DESCRIPTION
This DTC identifies a short to battery between the EBCM and the RED brake warning lamp, or an open driver that does not allow the RED brake warning lamp to be illuminated by the EBCM. This will only occur if an ABS malfunction is detected that may degrade base brake operation.

FAILURE CONDITION
DTC A088 can be set only at the beginning of the three second bulb check. If the EBCM detects battery voltage on the red brake warning lamp control circuit, a malfunction exists.

Action Taken
A malfunction DTC is stored. ABS is not disabled; however, the ABS indicator lamp will flash to indicate a malfunction exists.

TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. This step identifies if the ground circuit to the red brake warning lamp is being completed by a source other than the EBCM.
2. This step identifies if the malfunction is currently present.
3. By removing the 10 amp gauge fuse, the voltage source is eliminated. This test indicates if vo1tage is being supplied from a source other than the gauge fuse.

DIAGNOSTIC AIDS
An "Intermittent" malfunction may be caused by a poor connection, rubbed through wire insulation, or a wire that is broken inside the insulation.

The frequency of the malfunction can be checked by using the enhanced diagnostic function of the Tech 1.

Any circuitry, that is suspected as causing the intermittent complaint, should be thoroughly checked for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, Poor terminal to wiring connections or physical damage to the wiring harness.