Why did a new fuse blow?

I had an older gmc s15. After installing a aftermarket stereo it did the same thing. Believe it or not it ended up being the headlight dimmer Switch had gone bad and was already pulling alot of juice. The new stereo just made it trip and blow the fuse alot faster.

A fuse blows because the circuit it provide power to has a shorted component or wire.

you have a short circuit. a bare wire is in contact probably under the step plates or the carpet

need to check the wire harness for shorts

You could have a sort circuit, somewhere

may be waterlogged. internal seal failed and its shorting out..

when the fuse blows check for hot wires it seems to have a short somewhere hardist thing to find. look for naked spots on wires or pinched wires .

sounds like you probably need a new clutch. they short out internally and blows the fuse

Put a carb kit in it. If that does not work replace the gas cap they are supposed to breath and if they get clogged it will create a vacuum in the tank starving the engine for fuel.

make sure that the lights are off when you put the new fuse in.. if there is a load on the line the fuse will blew emmediatly... if they are off when you install it and it still blows when you turn them on than you have a short. time to pull out a test light