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Old 07-07-2019, 05:15 PM   #1 (permalink)
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Question Wiring Harness Recommendations

After a 10-12 year break I'm determined to get my Jeep project up and running. The tub was completely stripped so no wiring remains. Now I need to add the wiring back in but I'm not sure what wiring harness to get since none of the original Jeep electrical components remain. The engine and transmission have been swapped for a 4.3 and 4L60E. I have the engine and transmission wiring from the donor vehicle. I'm going to be running Autometer gauges.

My question iis, what wiring harness should I use? Plenty of companies have harnesses made to rewrite jeeps but should I use one of the Jeep harnesses since none of the electrical is still Jeep?
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Old 07-07-2019, 11:40 PM   #2 (permalink)
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It depends...How good are you at wiring?

If you're really good, just build one. Take your time. There are plenty of quality electrical parts on Amazon.

If you're not really good, look into EZ Wiring. I used one on my Mild M38 Build in the Willys section. My only regrets...getting the small fuse box and getting too many circuits. I got a 21 and all I needed was a 6. It has very clearly labeled wires and decent instructions. It was a fun and rewarding project.

I have an LM7 (5.3L) and I kept all of the factory fuel injection and ignition. I made the engine "stand alone" and simply used the coil/ignition wire to power the relay to the motor. You could do the exact same thing with your motor and transmission. I also used Autometer gauges. No problems. I even kept the OBDII port. Both harnesses work great together.

Good Luck


Or you could look into Painless, Summit Racing, or Speedway. They all have similar universal wiring kits.
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Old 07-12-2019, 08:23 PM   #3 (permalink)
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Hadn't really considered making my own harness from scratch but that may make for a fun project.
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Old 07-17-2019, 01:03 PM   #4 (permalink)
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Having bought 2 for my engine swap, I can say with ease buy quality. After spending a lot of time and money on the first one I ripped it out and bought a second one that fired up almost immediately. I highly recommend Hotwire Auto.
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Old 07-18-2019, 04:31 AM   #5 (permalink)
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speedway motors 12 circuit harness, its inexpensive, clearly labeled, comes with all the appropriate terminals, and works great. I've installed 4 now in different vehicles. I like it way better than whatever it is that summit and LMC truck sells. Centech stuff is good and so it Hotwire and but best bang for your buck is the speedway.

Im the "wiring guy" for a fairly reputable restoration shop. I mainly use Centech stuff as we do alot of Fords
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Old 07-18-2019, 09:35 AM   #6 (permalink)
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Thanks for the input. I’m not at the point of buying the harness yet. I’m working to get the chassis plumbed first then move on to the body and electrical. The project has been sitting forever and I’m just trying to get the best input from others that have actually completed their builds.
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Old 07-18-2019, 11:46 AM   #7 (permalink)
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when i did my jeep
i ordered keep it clean harness that had fuse block and flasher /stop relays

i ended up not using it as i used stock YJ harness and switch panel from
12V guy

i used stock jeep steering column, wipers ,horn,starter.hi/lo tied into the jeep harness

front harness got trimmed down to few wires ,
much simpler and everything is there already


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Old 07-19-2019, 07:14 AM   #8 (permalink)
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I used an EZ Wire harness when I did my CJ5. Very reasonably priced, well marked and easy to install.
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