Bare minimum wiring to run a 7.3??

vanderchevy18 · Jan 26, 2013

I'm trying to get the wiring done on the race truck and was wondering if someone could give me a cheat sheet. It would be awesome if someone had a wiring diagram with only the needed wires. I'm going to use switches for everything including the ignition. No key, turn signals, no heater/ac controls, radio, or anything. I want to run a power cutoff switch to the Pcm and fuel pump, and a push button for the starter. Also I want to keep the antilock brakes. If anybody has anything that could speed up the process would be helpful. Thanks!

Tom S · Jan 26, 2013

I think you truely would have to have the EVTM book on hand to get this right.

Dieselboy. · Jan 26, 2013

I think your best bet would be to grab a harness from a base model xl truck as it would have the least options. So les wiring. Basically dash an motor and ignition. The heat an signals you could leave out.

Just my .02

vanderchevy18 · Jan 26, 2013

Well I've got a good understanding of everything the engine needs to run. I've also got a pretty good diagram showing every wire in the harness. The problem is its going to take FOREVER to get it all sorted and figured out. I was hoping someone had done it already and could tell me how they did it.

under pressure · Jan 26, 2013

I think I'd start with a complete harness and remove items not needed once your runnin.

vanderchevy18 · Jan 26, 2013

The harness I have is a 1995 XL.

vanderchevy18 · Jan 26, 2013

I spent 3 hours today trimming wires from the fuse panel to the plugs that I don't need. Haven't even made a dent. LOL

powerstrokenstang · Jan 27, 2013

Ive done it. Lol takes awhile. It really doesnt take many of the wires at all.

vanderchevy18 · Jan 27, 2013

Got any pics?

powerstrokenstang · Jan 29, 2013

No it was ugly lol we put a 96 psd in a buddys 88 and just stripped down the harness and laid it over the original lol.

dustinz85 · Jan 29, 2013

you could do it like a buddy of mine did with a bagged hardbody... started the truck and started cutting wires, if the engine shut off, you need that wire LOL LOL

vanderchevy18 · Jan 29, 2013

LOLLOLLOL I don't think so man. I'm gonna just do it the slow way I guess.

Hotrodtractor · Jan 29, 2013

Why are you using an OBS harness instead of a SD harness? Since you are starting from scratch, don't you think you would be money ahead to have some of the better tuning capabilities found in the SD computers? This is a race truck after all......

vanderchevy18 · Jan 29, 2013

But.... Um.... Well.... I already have everything for an OBS. I'll have to buy a SD harness and electronics...... Ok. I'll see if I can find one and start over.......

fordfreak4life · Jan 29, 2013

vanderchevy18 said:
But.... Um.... Well.... I already have everything for an OBS. I'll have to buy a SD harness and electronics...... Ok. I'll see if I can find one and start over.......

Will one out of a 2000 ex cab work? I have the computers and wiring harness

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vanderchevy18 · Jan 29, 2013

Yeah!

vanderchevy18 · Jan 29, 2013

What do you want for em Dillon? That or you can just drop em off next time you come this way! Lol!

fordfreak4life · Jan 29, 2013

vanderchevy18 said:
What do you want for em Dillon? That or you can just drop em off next time you come this way! Lol!

Not mine, in a pickup my cuzin is parting out.... What's it worth?

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vanderchevy18 · Jan 29, 2013

No idea. Oh come on. You know March 8th is my birthday! Lol!

Strokersace · Jan 29, 2013

Pretty sure you'll need to run a 4r100 if you switch to the SD stuff. Food for thought.

I have a complete factory wiring diagram book for a 1995 if you want it. Pretty sure its at my dads. I'll be back there on the 8th for Equifest.