F 350 4WD Pickup V8-351 5.8L VIN H EFI (1997)
Brake Warning Indicator: Description and Operation
Service Brakes
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:
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The parking brake is not fully released.
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The brake fluid level is low in the master cylinder reservoir.
-
The vacuum pressure is low on diesel engine vehicles.
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.
