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-- First - double check that you have the right sized fuse. If you're using a 15 instead of a 30 - it'll blow for sure.
-- Maybe the light is too bright for your circuit. Try a dimmer bulb.
-- Next, have you had anything installed in your car BEFORE this started happening??? More specifically, on the same circuit as the one that is blowing??? If yes, you'll need to make sure that a no wire is touching any metal part of the car, or that no screw pierced a wire and now makes contact with metal or water.mthat can easily cause a short and blowbthe fuse.
Take a few moments to inspect the condition of the wires, make sure everything looks good and use electrical tape to repair if need be.
Blowing fuses is never an easy direct fix. Its rather a hunt needs some dedication. What I try and do is Figure out what is all on this 40 amp fuse, and one at a time remove something from the system and see if it blows. The key is knowing when it will blow for these tests to work. Keep removing what ever is on the system until it stops blowing a fuse. Then figure out how to single out items on that fuse. Whatever fuse it is the problem is on its path. Check all paths that go to items if no items are easily singles out. Replace as you find ,smash, green corrosion and shady connecters. Looks for heat by finding melted plastic connecters. These are clues. If you have a volt meter, then you will find the problem a whole lot easy, by figuring out what OHMS LAw is for whatever guage wire you are working with and a rough guess on length of known path. Using this you can find smashed and corroded wires quicker. As well as finding a short to ground and even short to powers in some cases. Good luck :)
Until you learn how to read a wiring diagram & can logically figure out exactly the only thing that could cause such a problem,you can't even start any on vehicle examination or testing to correct things
Hi Aaron, I'm glad to help!
Aaron, see if the fuse blows when you turn the key to the on position without trying to start it. If it does then it could be anything on that circuit. NOTE: If in fact it only blows when you try to start the engine then your problem is in the "START-RUN-CIRCUIT" which mean you have a dead short in either the wiring or something on that circuit. If you find it is on the start run circuit then disconnect the starter and see if it still blows the fuse. CAUTION: When disconnecting the starter always unhook the negative battery cable first then rap the power wire with a rag or tape so it doesn't ground out on the engine and cause more problems. Now that you've disconnected and rapped the starter wires reconnect the negative battery cable and try to start the engine, if the fuse doesn't blow then replace the starter. If the fuse does blow then reconnect the starter remembering my caution. NEXT: Disconnect the Alternator using caution and try to start the engine if it blows the fuse replace the alternator, if it doesn't blow the fuse then you have a direct short in the wiring somewhere in that circuit. Start looking for frayed wiring that could be grounding out on the engine. Hope this help and have an awesome day Aaron.
Find the starter relay, pull it. try to start the engine. if the fuse doesn't blow , replace the relay. If it still blows there is a short in the wire from the fuse to the relay. Check directly under the relay. this is where wires tend to break first.
yes, you just pull hard on the relay to pull it out, i dont beleive this is your problem tho. first place i would check is the rubber boots in the front door jams. pull them back ( with the batt. unhooked) and look for broken wires- or wires that are missing insulation and are laying on the vehicle body. hope this helps and good luck
Disconnect the battery and do a continuity check from the heater fuse to ground. It will probably be a short. If so do a physical check of the wire(s) from the heater to the fuse. Look at any place where the wire(s) bend and any place where it's possible for the wire to vibrate against metal even if you have to cut tape and pull it out of a bundle to follow it, retape it later. I have faith in you finding a burned wire, good luck.