Question about Cars & Trucks
15 amp ignition fuse blows
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Posted on Jan 02, 2017
There's a short in the circut. Check continuity of the wires that feed from that fuse (you'll need a wiring diagram to identify each wire). You've got something that is causing too much amperage to move through the circut and the fuse blows. Make sure the amperage on the fuse is correct for the application (your owner's manual or fuse box diagram should tell you what amperage rating to install in each fuse slot).
Posted on Jul 03, 2009
It sounds like a bad ignition switch or something is grounding out.Try to isolate the problem to key positions.See if the fuse blows when you turn the key to ACC(when your dash lights come on without starting)If the fuse does not blow then when you go to start it and it blows it could be one of many problems,the more common ones could be ignition switch,wiring,starter relay,starter soleniod,or perhaps the starter itself is shorting out,this can sometimes happen when a starter goes bad.
Posted on Apr 12, 2009
A fuse that is consistently blowing is telling you that there is a short in that system. Don't attempt to bridge it or use a larger amp fuse or you will have a major problem. You will need to start tracing wiring to destinations to find the short. If while moving harnesses around problem ceases to exist, look at nearby items where you are working and try to locate what was grounding. Sometimes people will stop if short disappears, leaving open the possibility of it happening again.
If you are not comfortable working with wiring, then leave it to professionals who do this every day. It's not really difficult but requires patience and a good bit of knowledge to do this right!
Posted on Apr 18, 2009
I had the same problem on my 2001 ford 150 supercrew. My cruise control went out first, then a couple months later I could not put my truck in gear and the windows wouldn't work. Then the #15 fuse (5 amp) kept blowing. One day when I went to work the truck caught fire. The problem was the speed control module. It was under a recall. I took it to ford and since I did not take it to them for the recall they only covered the parts that was initially in the recall. I had to buy the other parts.
Posted on Jul 30, 2009
It MUST be the starter relay coil - or the power wire that feeds it. Likely a short in the relay coil (AKA starter selenoid).
Posted on Oct 12, 2009
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