mcnally

92 I6 F150

I just realized that when I press on the brake the fuse blows.
I checked the 2 brake light sockets and also disconnected both of the back brakes from the harness underneath the bed back there. The fuse still blows.

They worked when I first got the truck but today after finishing replacing the dash and the starter switch and solenoid I noticed the fuse starting to blow. Also I noticed while inspecting the brake lights they were constantly lighted up.

Any ideas?

dr_bowtie

pinched wire somewhere

mcnally

Would anything else cause this? Perhaps the multifunction switch? This symptom seems to be intermittent well intermittent in that it worked for a while.

If my tail light bulbs are on constantly, where is the most likely location of the pinch? under the dash?

Thanks,

mcnally

It took a while but the problem was resolved by reading the electrical schematic. There was a short to ground on the wire coming from the brake pedal switch to the multifunction switch. Instead of removing the entire dash to find it, I ran a new wire and neatly soldered it in.

Thanks,
Matt