Corsica V6-3100 3.1L VIN M SFI (1996)
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." Two switches are connected to the
Brake Indicator. When either one of these switches closes, ground is provided and the indicator lights.
The Electronic Brake Control Module (EBCM) 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 the hydraulic system. The switch can be reset to an open position by refilling the reservoir; however, this should only be
accomplished after the faulty system has been repaired.
The Electronic Brake Control Module (EBCM) will cause the BRAKE Indicator to light for a few seconds when the ignition is turned to "RUN" as a
Bulb Test. It will also turn on the indicator when the Anti-lock Brake system degrades the base brake system.
System Diagnosis
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Perform the System Check and refer to the Symptom Table for the appropriate diagnostic procedures.
System Check
Troubleshooting Hints
PERFORM BEFORE BEGINNING SYSTEM DIAGNOSIS:
1. Check Fuse 9 by observing BRAKE Indicator Lamp Indicator with Ignition Switch in "RUN" and engine off.
.
Check Ground G101 by operating Blower Motor.
3. If BRAKE Indicator does not light for a particular condition, check suspect switch, CKT 33 and CKT 150. Replace/repair as necessary.
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Check for a broken (or partially broken) wire inside of the insulation which could cause system failure but prove "GOOD" in a continuity/voltage
check (refer to "General Troubleshooting Procedures,"). See: Diagrams/Diagnostic Aids
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Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems (refer to "General
Troubleshooting Procedures,").
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Refer to System Diagnosis. See: System Diagnosis
