Eighty-Eight Royale FWD V6-3.8L VIN K (1996)
Brake Warning Indicator: Initial Inspection and Diagnostic Overview
Circuit Operation
The BRAKE indicator receives battery voltage when the ignition switch is in RUN, BULB TEST, OR START. Three switches are connected to the bulb
so that when any one closes, the indicator lights. The ignition switch BULB TEST position does not have a detent, but the ignition switch should close to
ground and light the BRAKE indicator before the START position is reached.
The master cylinder brake fluid level switch closes to light the BRAKE indicator and briefly sounds a fast chime when there is low brake fluid in the
hydraulic brake systems. This could be caused by a leak in one of the brake lines. The switch opens by refilling the reservoir to its normal level. Make
sure the brake system has been repaired before filling the master cylinder reservoir.
The park brake switch closes when the park brake is applied, lighting the BRAKE indicator. Vehicles equipped with U2E clusters also briefly sound a
fast chime after the vehicle has traveled approximately 50 feet. Vehicles equipped with UH8 or U2A clusters briefly sound a fast chime when the gear
selector lever is moved out of PARK or NEUTRAL. Releasing the park brake opens the switch and turns off the BRAKE indicator.
System Diagnosis
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Perform the System Check and refer to the Symptom Table for the appropriate diagnostic procedure(s).
System Check
Troubleshooting Hints
PERFORM BEFORE BEGINNING SYSTEM DIAGNOSIS:
1. Check I/P Fuse Block Fuse ID by visual inspection.
2. 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
3. Check for proper installation of aftermarket electronic equipment which may effect the integrity of other systems. (Refer to General
Troubleshooting Procedures).
