Why am I suddenly blowing the same fuse over and over? - Ford Powerstroke Diesel Forum
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post #1 of 14 Old 11-15-2011, 06:49 PM Thread Starter
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Why am I suddenly blowing the same fuse over and over?

My '06 has decided to keep blowing the same fuse. It is no. 17, controls the dash lights, door switch lights, and taillights. The headlights, turn and brake lights work.
It happened last week, tracked down the fuse, changed it and driving less than 5 min, blew again.
Any thoughts?
Oh, it also controls the foglights.

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post #2 of 14 Old 11-16-2011, 04:35 AM
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If you keep blowing fuses I would check for a short. Somewhere a wire is making contact with ground. Good luck as these can be a real pain to find. I wouldn't ignore it and put in a bigger fuse. I know a guy that did that and his truck caught fire.

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post #3 of 14 Old 11-16-2011, 04:51 AM
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You've got a short somewhere. Any recent electrical changes to that circuit?

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post #4 of 14 Old 11-16-2011, 06:07 AM Thread Starter
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Quote:
Originally Posted by Dave View Post
You've got a short somewhere. Any recent electrical changes to that circuit?
No, just happened out of the blue. Have not done any work to any of the electrical systems.
That is what is odd. I know there is a short someplace, but not sure how or where it has occured. Until now, had zero electrical issues.

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post #5 of 14 Old 11-16-2011, 08:12 AM
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Has it been raining where you are? I had a problem with my last f350 that when it rained, it leaked into the tail light and short the system there. I had a crack in the tail light assembly that I didn't think much of until it cause me problems.
*Check all your lights for cracks of any size and either fix them or replace them.

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post #6 of 14 Old 11-16-2011, 08:15 AM
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Most of the wiring bundles are on the drivers side so the only thing I can suggest is to start at the front push and move from side to side on bundles every foot or so while a friend watches for the fuse to blow because a wire is touching metal somewhere.

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post #7 of 14 Old 11-16-2011, 09:33 AM Thread Starter
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Quote:
Originally Posted by soccerman View Post
Has it been raining where you are? I had a problem with my last f350 that when it rained, it leaked into the tail light and short the system there. I had a crack in the tail light assembly that I didn't think much of until it cause me problems.
*Check all your lights for cracks of any size and either fix them or replace them.
No rain. Just blown fuse. I will have to start a hunting expedition, I suppose.

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post #8 of 14 Old 11-16-2011, 10:26 AM
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I expect the harness chafed somewhere and you are getting a ground fault.
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post #9 of 14 Old 11-16-2011, 01:39 PM Thread Starter
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Quote:
Originally Posted by PGreenSVT View Post
I expect the harness chafed somewhere and you are getting a ground fault.
Is there a spot where this is most likely the culprit? Or several spots? I don't want to check the entire harness if there is a/several problem spots I can start at.
thanks

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post #10 of 14 Old 11-16-2011, 01:52 PM
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Check locations that pass over an edge such as the frame and locations that do not have that corrugated plastic covering on the taped bundle. Also check locations that would get a lot of heat, for example the bundles that come down the firewall near the exhaust manifold gets a lot of radiant heat and that protective corrugated plastic cover breaks down and gets brittle.

SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.
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