You take it to a mechanic who will diagnose it. He will figure out the cause of the problem, then tell you the name of whatever part is needed. There's no way I can know that if you aren't going to test anything. Mechanics don't have it that easy. If the fuse is labeled "fuel pump" logic dictates the fuel pump is shorted and that's the name of the part you want. Experience, however, shows that pumps rarely short so chances are you waste your money on a new pump because I told you the name of the part, then you're angry with me when the fuse still blows.
If you do my light bulb trick, as many intelligent mechanics would do, you can simply unplug the pump, then see if the bulb went out. If it did not, you know the short is still there and it's not the pump. Your choice if you want to spend money on something that very likely isn't needed.
There's actually two different fuses involved with the fuel pump circuit. The second one also feeds the ignition coil pack, injectors, alternator field, and oxygen sensor heaters. None of those things typical short either, and none of them are listed on that fuse. Most commonly a wire going to one of those things is grounded. You can spend all day tearing wire harnesses apart looking for that. Mechanics don't want to waste time that they have to charge you for, so they use my light bulb, then they just push and wiggle the wires to see what affects it. 95 percent of the time there is no part that needs to be replaced when a fuse blows. Most shorts are related to bare wires that are repaired.
Friday, March 22nd, 2013 AT 11:10 PM