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To tell you my story. I have a 1995 F-150 5.0L XL Automatic. For a bit of back ground, I'm what you might call a YouTube mechanic, without a ton of experience. A little while ago, a started my truck, went to go into drive to find the truck would not move from park, and ABS light was on, fuse 8 was popped, no brake light either. I put a new fuse in, turned the truck on, popped again. (To be honest the beginning of the story is getting kind of blurry as its been a while) If I start from neutral the truck will move, this is the part that I'm losing, without really an mechanical work I got a fuse to stick cant quite remember how, then after a couple days, brake lights are now stuck on, no fuse popping. if I puIled 8, it did not turn the brake lights off, only fuse 7(i think) would, ordered a brake switch and parked the truck. Installed the new brake switch, and the brake lights remained stuck on, got pissy and parked the truck again. Came back a week or 2 later to a dead battery (the truck has sat longer than that through the winter months with no dead) boosted it, and everything seemed to work for a good couple of weeks. The same first problem then returned, no brake lights, fuse 8 popped. However this time, the fuse pops in my hand the second I insert it, truck is off, and I can see the spark. I have traced as far as I understand most of the components that are listed for fuse 8, can't seem to find the issue. I have even since replaced the battery. Any ideas?
Start by studying these wiring diagrams.
Disconnect all the components shown on the bottom of the images. While you're in disconnecting stuff, Take a look at the connectors and the wiring for damage.
Plug in a new fuse. It shouldn't blow.
Then connect each component until it does blow.
disconnect the item that caused it to blow and reconnect the other items.
Now that you've isolated the bad circuit, you can track it to the problem.
I'm guessing it's a courtesy light problem.
Try reinstalling the brake lamp switch with the black washer going on the stud first
Then the switch and white washer
Got a feeling you have melted sockets, and possibly a wrong bulb somewhere
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