Five problems related to starter have been reported for the 1999 Ford F-150. The most recently reported issues are listed below.
The windshiel leaks on this model style and the ater runs down to the gem module and fuse box causing the gem module to short out and the electronics do what ever they want to. The truck will start on its own even if off or running and driving with the starter ingauging. Windows roll down the alarm actvates radio comes on all the electronics come on at there own even when parked with the engine off and the key removed. This is a very common problem from my research to tens of thouands of these trucks. This is very dangerous due to the car can even engage the transmission as well as it can cut off while driving as it has with myself. This part is very expesive and the leak is very common.
Bought a used truck, and after the warranty expired had to replace the starter/the ball joints/he upper tie rods, and the control arm on both sides. Engine manifold split, and exhaust system rusted. Later, while driving tie rods came off. There was a slight drop at the entrance to the parking lot, and as vehicle went back up the drop, it slid and there was an impact. Got out of the car, and saw that the tie rod came off and gouged into the pavement. Spoke to the manager of country club Chevrolet, and he simply gave consumer a discount on parts and labor. Yesterday he went to a certified used vehicle dealer and asked for the 88-point inspection,, and they were unable to provide that information.
The 4 wheel drive in the consumer 1999 Ford f150 engaged in low range while driving. This caused the truck to jerk, lose control and the rear end to go out. The consumer had a new rear end put in but the truck has continued to go in and out of 4 wheel drive automatically. Now the truck start on it's own. The consumer had to disconnect the battery to keep from burning out the starter. When the cruise control is on the transmission wouldn't shift and the rpm's raced into the red. The consumer could hear clicks under the dash while this was happening which resulted in the battery being drained. The radiator leaked.
Ignition wire on starter has broke off, dealer was notified. Consumer stated the wiring harness has too much weight to the starter.
Water was getting down into the dashboard and causing windshield wipers to stop. The windshield wipers work normal when the vehicle is in neutral or park. The wipers would only work on low, the radio would cut off when driving in the rain which would happen after 10 minutes, the vehicle wouldn't turn over. The diagnosis was that harness assembly needed to be repaired at the starter assembly. There was a clicking sound coming from under the dash, and the theft light flashed. The mechanic found a bad gem module which also caused the blower to stay on and drain the battery. The heater bower wound not shut off intermittently when shutting the trunk off and had to be manually shut off.