Hey all, I just bought a 1981 Subaru GL on Saturday--my first car, yay!Anyways the guy I bought it from said that the headlight fuse ocasionally blows out. Yep, its done it twice since I've had it.The first time I was driving and charging my phone in the cigarette lighter (maybe it can't handle everything at once?). Second time was two hours ago I went to start the car and the lights wouldn't come on.What's the underlying issue here? Fuses are cheap and easy to find but id rather fix it for good than having to buy a new set of fuses every couple if weeks.
Check your wiring harness. It can be shorting out if there is contact between two bare wires (rat damage) or a wire that is not grounded properly. Make sure nothing is stripped or bare, you should never be able to see through the plastic on wires. Make sure your battery is not corroded and grounded properly. Test light your harness to make sure the hots are hot and the nots are not. There is a lot of stuff on forums for wiring diagrams and such to make sure that no one pieced it together wrong or cut/spliced into something they shouldn't have. If your Lights are spliced with a higher voltage component the wires will get hotter than they were designed for and that will cause a fuse to burn out. Hope that helps. Follow the wires from the back of your headlight all the way to the firewall and make sure connection to battery is still good (will will likely have to pry apart that black slinky looking wire cover to make sure it's all good under the hood). Make sure to check for signs of pests!
