I have a 1992 ford f150 and it keeps blowing the fuse that controls the interior lights, the radio, the gauge lights, and the speedometer. Now don't say the speedometer hooks in with a cable because it doesn't. It's a clip of wires that plug into it. Anyway I have taken apart the entire dashboard and tested for grounds and everything is getting ground and I even found where it grounds on the body. Sometimes the fuse pops as soon as u put it in and sometimes it takes ten minutes. I looked at all the wires and nothing seems to be broken or chafed or crossed. It will pop even when the radio and gauge cluster is unplugged and I have wiring diagrams and the wires run through the light switch and even of that's unplugged the fuse pops. I am getting fed up with this thing. Been tryin to figure it out for an entire day and got nowhere. Help is very much appreciated
My first thought would be that you don't have a high enough rated fuse plugged in. I know they're color-coded AND stamped with the amp ratingbut are you sure it's the right one? Have you gone up a size to see if that helps? If you have a short, going from a 10- to 15-amp fuse, for instance, won't really run the risk of damage—it'll still blow. If you're confident about the rating or going up a notch doesn't help, you might have to disconnect everything on that circuit and plug the components in one-at-a-time until you find what blows the fuse. Once you have a suspect, pop in a new fuse and plug in just that one thing. If it blows again with nothing else on, you know where your problem is. Good luck!
