Cutlass Ciera L4-2.2L VIN 4 (1995)
Brake Warning Indicator: Initial Inspection and Diagnostic Overview
Circuit Operation
Battery voltage is applied to the "BRAKE" Indicator when the Ignition Switch is in "RUN," "BULB TEST" or "START". Four switches are connected
to the "BRAKE" Indicator. When any of these switches close, ground is provided and the indicator lights.
The Ignition Switch provides a ground when it is in the "BULB TEST" and "START" positions.
The Park Brake provides a ground when the Park Brake is applied. The Brake Fluid Level Indicator Sensor closes to light the "BRAKE" Indicator with
low brake fluid in one of the two hydraulic brake fluid reservoirs. This could be caused by a leak in one of the brake lines. The switch can be reset to
"OPEN" by refilling the reservoir; however, this can only he accomplished after the faulty system is repaired. If equipped with Antilock Brakes, the
Electronic Brake Control Module (EBCM) closes to light the "BRAKE" Indicator and sets a diagnostic trouble code when an Antilock Brake failure will
affect base brake operation.
System Diagnosis
Perform the System Check and refer to the Symptom Table for the appropriate diagnostic procedures. See: System Check See: Symptom Related
Diagnostic Procedures/Symptom Table
System Check
Troubleshooting Hints
Perform before beginning System Diagnosis
1. Check GAGES Fuse by visual inspection.
2. Check that G202 is clean and tight.
3. Check brake fluid. If low, refer to Brakes. See:
4. If brake fluid is low and the "BRAKE" Indicator does not light, check the Brake Fluid Level Indicator Sensor.
5. If equipped with Antilock Brakes and "BRAKE" Indicator is lit, check for trouble codes. Refer Antilock Brake System. See: Antilock Brakes /
Traction Control Systems
6. If equipped with Daytime Running Lights, (DRL) and the "BRAKE" Indicator does not light with the Park Brake set, check CKT 33, CKT 1134
and Park Brake Switch for an open or short to B+. If OK, replace the DRL Module.
7. If the "BRAKE" Indicator does nor light at all, check:
- The "BRAKE" Indicator bulb for an open.
- The Instrument Cluster printed circuit for an open.
- The TAN/WHT (33) wire for an open.
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Check for a broken (or partially broken) wire inside of the insulation which could cause system malfunction but prove "GOOD" in a
continuity/voltage check with a system disconnected. These circuits may be intermittent or resistive when loaded, and if possible, should he
checked by monitoring for a voltage drop with the system operational (under load).
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Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems refer to Diagnostic Aids. See:
Diagrams/Diagnostic Aids
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Refer to System Diagnosis. See: System Diagnosis
