1996 Ford F150 Owner's Manual - Page 205

Rear Anti-lock Brakes Except for F-Super Duty and F-Series Commercial and Motorhome Stripped Chassis, F-Series Light Trucks are equipped with a Rear Antilock Brake System. This system prevents at least one and often both rear wheels from locking up when the brakes are applied in a panic stop, for example. Even with the Anti-lock Brake System, you should be careful when braking. Front brake lock up on any surface, even on smooth pavement causes loss of steering control. Heavy braking on roads with loose surfaces such as snow or gravel, or severe pavement irregularities could also cause you to lose steering control of your vehicle. RWARNING If the anti-lock brake system warning light remains on or comes on while driving, have the braking system checked by a qualified service technician as soon as possible. NOTE: If a fault occurs in the anti-lock system, and the brake warning light is not lit, the anti-lock system is disabled but normal brake function remains operational. If Brakes Do Not Grip Well or Pedal is "Low" (F-150/350 Only) If brakes do not grip well, it may indicate the rear drum brakes need adjustment. To do this, drive the vehicle in reverse at 5 mph (8 km/h) on level, dry pavement. Stop the vehicle by firmly applying the brakes. Repeat this procedure four or five times. 203