Join Date: Jul 2008
Location: Austin Texas
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Description and Operation
The brake warning light in the instrument cluster is used to warn of system malfunctions. The red warning light for the brakes can indicate three conditions:
The parking brake is not fully released.
The brake fluid level is low in the master cylinder reservoir.
The vacuum pressure is low on diesel engine vehicles.
Diesel vehicles use a low vacuum indicator switch. The low vacuum indicator switch is located on the left side of the engine compartment near the vacuum pump. The low vacuum indicator switch will turn on the brake warning lamp when a low vacuum situation occurs.
Rear Anti-Lock Brakes
The yellow anti-lock brake indicator lights up for approximately two seconds when the key is first moved to RUN or START for circuit proveout. The indicator also lights up when the RABS module detects a malfunction in the system.
The self-test feature contains codes that indicate the area of the malfunction. When a malfunction is detected, the RABS control module shuts down the system and the yellow anti-lock warning indicator comes on. This permits normal braking. A code can be retrieved by momentarily grounding the diagnostic pigtail (black with orange stripe wire) after it is disconnected from KAM (keep-alive power red wire) and counting the flashes of the yellow ABS lamp. To make sure the diagnostic trouble code (DTC) is not lost from memory, the key must be left in the RUN position before the diagnostic lead is disconnected from KAM power. If more than one diagnostic trouble code exists, only the first code stored will be displayed. Additional codes will be output only after the first fault is corrected.
2006 Ford F250 CCSB FX4 6.0
1997 F350 CCLB 2WD 7.3
1999 F350 CCLB 4WD 7.3
2003 F350 CCLB FX4 6.0