1996 Ford Bronco Owner's Manual - Page 205

u During an Anti-lock stop, the driver will notice a brake pedal pulsation and hear some noise from the engine compartment. This is an indication that the 4WABS system is working correctly and is normal. 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 amber "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 amber "ABS" light on the instrument cluster will come on and stay on indicating that the antilock system has been shut down and the vehicle needs to be serviced. Normal braking is not affected unless the red brake warning light is also illuminated. 205