J2000/Sunbird V6-191 3.1L VIN T MFI (1994)
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. Three switches are connected in
parallel to the BRAKE Indicator. When any one of these switches closes, 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 Switch provides a ground when the Park Brake is applied.
The Brake Fluid Level Switch closes to light the BRAKE Indicator when there is low brake fluid in one of the two hydraulic brake systems. This could
be caused by a leak in one of the brake lines. The switch can be reset to an open position by refilling the reservoir, however this can only be
accomplished after the faulty system has been repaired.
The Electronic Brake Control Module (ECBM) will cause the BRAKE Indicator light only when the Antilock Brake system degrades the base brake
system.
In cars with Daytime Running Lights, the Daytime Running Lights remain OFF if the BRAKE Indicator is lit.
System Diagnosis
Diagnostic steps for the symptom listed in the following table are listed after the table. See: Symptom Related Diagnostic Procedures/Symptom Table
System Check
System Check Table
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Refer to the diagnosis given it other results occur.
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Refer to Starting and Charging for Ignition Switch access information. See: Starting and Charging
Troubleshooting Hints
TRY THE FOLLOWING CHECKS BEFORE DOING THE SYSTEM CHECK:
1. Check GAGES Fuse by observing the Malfunction Indicator Lamp with the Ignition Switch in RUN and the engine OFF.
2. Check ground G100 by operating the Blower Motor.
3. If the BRAKE Indicator does not light for a particular condition, check the suspect switch for battery voltage at the TAN/WHT (33) terminal and a
good ground circuit. If wires are good to suspect switch, replace suspect switch.
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Go to System Check for a guide to normal operation. See: System Check
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Go to System Diagnosis for diagnostic tests. See: System Diagnosis
