Beretta L4-138 2.3L DOHC QUAD 4 HO MFI VIN A (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 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.
If the vehicle is equipped with Daytime Running Lights, the Park Brake Switch applies grounds to the BRAKE Indicator via a diode within the DRL
Module.
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 (EBCM) will cause the BRAKE Indicator to light only when the Antilock Brake system degrades the base brake
system.
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 Fuse 9 by observing Malfunction Indicator Lamp Indicator with Ignition Switch in "RUN" and engine off.
2. Check Ground G101 by operating Blower Motor.
3. With T61: If setting Park Brake does not force BRAKE Indicator to light, check CKT 33, CKT 1134 and Park Brake Switch. If all are OK, replace
the DRL Module.
4. 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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Refer to System Diagnosis. See: System Diagnosis
