1996 Ford Ranger Owner's Manual - Page 180

RWARNING The Anti-lock system does NOT decrease the time necessary to apply the brakes. Always leave enough room between the vehicle in front of you and your vehicle. 4WABS driver warning light The 4WABS computer continuously monitors the system while driving for any electrical faults or system malfunctions. In addition, the 4WABS computer performs an initial system check called bulb proveout when the vehicle ignition is switched on. During bulb proveout, the ABS light on the instrument cluster will momentarily illuminate and then go out. NOTE: After starting the vehicle and upon initial drive-off, the driver may notice a single pulse of the brake pedal and a noise from the engine compartment. This is part of the initial system check and is normal. Should a malfunction in the 4WABS system occur, the ABS light on the instrument cluster will come on and stay on indicating that the anti-lock system has been shut down and the vehicle needs to be serviced. Normal braking is not affected unless the brake warning light is also illuminated. NOTE: It is important to note that when the ABS Warning Light is illuminated the ABS system is disabled. The vehicle must be serviced immediately to restore the benefits of the Anti-lock system. NOTE: Mobile phones or radio transmitters not installed by Ford Motor Company may interfere with the Anti-lock System. Should the Anti-lock system activate unexpectedly or the Anti-lock Warning Light illuminate after installation of such a unit, have the installation of the unit checked. 180