"Blowing" FusesFuses and Circuit Breakers are safety devices designed and installed in electrical circuits TO PROTECT the conductors [wires] from short circuits and overload conditions which can cause extreme overheating which can result in damage to the conductors, and worse, the possibility of a FIRE which could destroy the vehicle. When a fuse, and replacement fuses blow, is an indicator of an UNSAFE CONDITION in that circuit, usually a short. Do not install a larger fuse in a misguided attempt to correct the problem. To install a larger fuse would invite damage to the wiring and an electrical system fire. The proper "fix" is for a qualified technician, who knows what he/she's doing, to troubleshootthe circuit, find and identify the defect, and make proper repair [s], BEFORE replacing the fuse again [with the properly sized fuse].
A short in the brake light circuit.
short circuits in the turn signal and brake light circuits
A blown fuse is always a sign of excessive current flow. In this case, it's probably caused by a short circuit in the brake light wiring.
There is probably a short in the wiring.
A short, water getting in the light socket. exc.
Sounds like a short, But it could be the break light switch.
There is a dead short to ground in the circuit.
There are several things that can cause your brake light fuse to blow and keep your 1994 Ford F3 50 locked in park. The most common cause is a malfunctioning neutral safety switch.
Most likely one or both brake light lamp sockets are corroded. This will short the circuit and blow the fuse. The only other most likely cause is a loose wire connection at the socket or fuse holder.
The trailer has a dead short in that right side brake light circuit.
Check to see if water is getting into the brake light sockets causing them to short to ground
be cause the wind would blow and some thing would cause it to light up