Don't know where loose wire goes? - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 02-09-2014, 02:31 PM Thread Starter
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Don't know where loose wire goes?

The next time any of you 7.3 owners are under the hood, could you please look at the wiring harness that is in front of the drivers side battery, fastened to the front of the engine compartment. Looking down at the harness, the wire on the bottom (a red one in a black protective conduit) where does it go? I just noticed mine is hanging loose and I'm not sure if I knocked it loose while putting in an air intake to day or if its been that way for a while. I can't seem to find a wiring diagram on line. Any help would be appreciated. Thanks.
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post #2 of 12 Old 02-09-2014, 02:49 PM
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It's probably one of four wires that are run through the fire wall for us from the factory.
There should be a red, black, white and a blue. And the other ends are under the dash

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post #3 of 12 Old 02-09-2014, 03:09 PM Thread Starter
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No, it's the front side. If you are standing in front of the truck, it's located at the bottom right corner, between and above the air intake and the headlight. It's only about a foot long. In wondering if it's supposed to be attached to the battery.

2000 Ford Excursion 7.3, AIS intake, 4" MBRP exhaust, PHP Hydra Chip, Bilsteins (5100 in front and 4600 in back) and x code front springs to be added when I can find the time to put them in.
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post #4 of 12 Old 02-09-2014, 03:12 PM
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Does it go to a small junction to a nut with 2 wires going into the cab on the other side? If its not connected how is it running? Got pics?


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post #5 of 12 Old 02-09-2014, 03:30 PM Thread Starter
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This is a pic looking at the battery from the front drivers side. the wire in question comes out of that little black box/junction/connector/harness or whatever its called, and I have it laid over the battery, over the positive terminal. The little black box has several wires coming out of it, but its the one on the bottom that's disconnected. Thanks for the quick reply's!


Last edited by MAArcher; 02-09-2014 at 03:30 PM. Reason: adding picture link
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post #6 of 12 Old 02-09-2014, 05:41 PM
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Goes to positive.


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post #7 of 12 Old 02-09-2014, 06:44 PM
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is it a relay for fog lights or something?

99.5 f250 7.3 4x4 260k FF 160/30, PHP Hydra, S&B CAI, 4" Exhaust, RR Billet Wheel, Autometer Gauges, Transgo, Non-Ebpv Pedestal, High Flow Outlet, 08 Tow Mirrors.

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post #8 of 12 Old 02-09-2014, 06:52 PM Thread Starter
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I don't have fog lights.
Can I get a second on the positive terminal before I risk frying something?
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post #9 of 12 Old 02-09-2014, 08:14 PM
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It's probably for an accessory that the previous owner had.
Maybe a stereo amp?
If everything else in the truck working as it should I would probably leave it alone.

PIS 230/80's, Van Turbo with EBPV, BD Billet Wheel
Lots of money spent at RiffRaff
Dual SD fuel pumps, in tank mods, CNC Fab bowl retain kit. SDK Tunes. Isspro.
Still pretty slow, just less slow now.
Quote:
Originally Posted by peixinho View Post
I love finally having my truck back... that 7.3 dog that I was driving was just not cutting it.
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post #10 of 12 Old 02-09-2014, 09:15 PM
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That little black box looks like a relay. It is something that a previous owner installed. Its most likely for some after market lights or something that he had on the truck.

If it was me, I'd rip the relay and all the wire out of their. It looks like a cobbled half *** job to me. If you want to add some extra accessories, then I would start over from scratch.




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