Two problems related to brake antilock control unit/module have been reported for the 1999 Ford F-150. The most recently reported issues are listed below.
Brakes don't work when I back up or when going slow forward.
I drive a 1999 Ford F-150 pickup truck and have found that failure of either of the front wheel abs sensors makes it nearly impossible to bring the vehicle to a stop. The right sensor failed in April . . . . And I crashed into a wall at our local hospitals parking garage . . Fortunately I was only going 15 mph. ($300 damage to the front bumber - air bags did not deploy) now the left sensor has failed. Same safety issue . . . The vehicle's brake pedal gets very hard and you can not get stopped. My truck is not used for dirty commercial work, it is a family use pickup. I personally do not understand why Ford would put a vehicle on the road that could easily cause brake-loss related crashes. The service rep at our local dealership said this morning, " I always thought when the abs sensor failed, you just had regular brakes. " he knows now this is not true. This same chassis and brake design is probably used on certain Ford SUV's, further extending the problem.