Firebird V6-3.8L VIN K (1995)
Brake Warning Indicator: Initial Inspection and Diagnostic Overview
Circuit Operation
When the Ignition Switch is turned to "RUN," "BULB TEST" or "START," voltage is applied to the Instrument Cluster through CKT 39 from Gages
Fuse
1. The "BRAKE" Indicator receives a ground through CKT 33 by any one of three components: the Park Brake Switch, Brake Combo Valve,
Electronic Brake Control Module (EBCM) or the Electronic Brake/Traction Control Module (EBTCM).
When the Ignition Switch is turned to "RUN," CKT 33 is grounded through the EBCM or EBTCM, illuminating the "BRAKE" Indicator for
approximately 3 seconds. When the Park Brake is set, the Park Brake Switch closes, grounding CKT 33 through the Park Brake Switch. For a better
understanding of when the Brake Combo Valve, EBCM or the EBTCM will ground CKT 33, refer to Brakes and Traction Control. See:
System Diagnosis
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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
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Check for Antilock Brake or Traction Control DTC(s).
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Check for an open Gages Fuse 9.
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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 be
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/General Troubleshooting Procedures,"). See: Diagrams/Diagnostic Aids
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Refer to System Diagnosis. See: System Diagnosis
