Still blowing fueses! - Ford Powerstroke Diesel Forum
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Old 04-09-2007, 04:38 PM
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Question Still blowing fueses!

I have a 2000 350 , and I keep blowing brake light fues (#13). I replaced the brake pedal position sensor, it bought me about two minutes before it would blow again. Not sure what to look at next. Please help!
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Old 04-09-2007, 04:41 PM
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hmm sounds like your wireing is chafed and shorting out somewhere?
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Old 04-09-2007, 04:44 PM
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Quote:
Originally Posted by donkeydic View Post
I have a 2000 350 , and I keep blowing brake light fues (#13). I replaced the brake pedal position sensor, it bought me about two minutes before it would blow again. Not sure what to look at next. Please help!
I think you need to climb underneath the truck and start following your harness back to the rear of the truck. If you do not have a chiltons manual I suggest you get one. As they have a wiring schematic in the back of them. Your going to need it. The Harness runs along the frame on the drivers side. You have a short somewhere and the wire is grounding out causing your fuze to blow. Good luck finding it and repairing it.
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Old 04-09-2007, 05:10 PM
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check your trailer adaptor wires good at rear of truck
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Old 10-31-2007, 03:50 PM
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Buy a cheap voltmeter with a resistance or ohm setting. You are probably going to need it to troubleshoot the wiring. I don't know much about these trucks, having just bought one, but I am an electrician. Once you have a manual with a wiring diagram, you can see what color wire you are looking for. Go to the rear end of the truck and disconnect any wiring harnesses that contain that color of wire. Put one lead on the terminal matching the appropriate wire color and ground the other on the frame of the truck. When you find a point where the meter shows a drop in resistance, you have narrowed down the trouble spot. This can be a bit of a process. I don't know how many places you can disconnect harnesses on the truck. In the case of electrical troubleshooting, the more places you can easily disconnect the better. Good luck.
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Old 10-31-2007, 03:52 PM
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Haha. I'm new to the forum and just realized how old this thread was. I would hope the OP has his problem sorted out by now.
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Old 10-31-2007, 04:43 PM
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Thats quite all right any info you want to add is greatly appreciated. Especially when it comes to electrical
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Old 01-28-2008, 07:49 AM
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Blowing Tail Light Fuses Solution

I have had the same problem on my 2005 F350. After several visits and lots of frustration I met the head diesel guy at my dealer. He changed the flasher relay under the dash and bingo problem solved. He said these relays are notorious for over heating and blowing fuses. Good Luck.
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Old 03-09-2008, 09:31 PM
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I had a very similar problem with blowing fuses. I bought a new column switch because I had read that they have a common problem with shorts. In the end however, it turned out to be the $20 Flasher. I got a new one a problem is gone. I did take the old flasher apart and discovered it had shorted out inside.
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