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M38A1 Harness for Civilian Jeep

plym49

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I hope that this post is not off topic for this forum.

My DD is a 1990 civilian YJ Jeep. The stock lighting wiring harness is showing its age as well as indignities wrought by prior owners. I am a bug about good wiring; this 20-year old wiring is just not aging well, and on its best day it was not as durable and water-resistant as a military-spec harness.

I look at the harness and connectors on my 40-year old Deuce, and my Jeep is hopelessly behind. And so an idea formed, and as I am not an expert on the M38 vehicles, I thought I would poll you experts on whether it might be feasible.

I am thinking about using the wiring harness for an M38 series for my lights. This would include the use of military connectors. I would replace my taillights with military units. I would install the correct military three lever light switch. I would either retain the stock front parking lights, adding military connectors, or replace them with military units. I would wire into the dash lights, and I would retain the blackout lights.

It is no problem for me to wire this in to the vehicles remaining electrical system. This is a carb'd vehicle; in any event I am proficient with vehicle wiring.

My biggest question is whether the M38-series harness will reach to the four corners of my YJ Jeep. It would not make sense for me to do this if I had to lengthen the harness. If the M38 harness is a little long in places, I can neatly dress the extra length easily enough.

I assume that the M38 is the closest dimension-wise to the tub of my YJ. If that is an incorrect assumption, then what would be the correct military vehicle to use as a donor?

BTW, I expect that I can purchase a NOS or repro harness. I would not really want to strip the harness out of an extant vehicle.

Opinions. please. Thanks in advance.
 

NDT

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NOS harnesses are not available, and repro ones are like over $400, and use the older style metal shell connectors, and do not have turn signals. You have a good idea though. Buy some bulk mil wire and the connectors and make up your own harness exactly to what you need.
 

plym49

Well-known member
1,164
171
63
Location
TX USA
NOS harnesses are not available, and repro ones are like over $400, and use the older style metal shell connectors, and do not have turn signals. You have a good idea though. Buy some bulk mil wire and the connectors and make up your own harness exactly to what you need.
The cost I can justify if it eliminates the time for wiring for a custom harness - the rule of thumb is one hour per circuit. I was also looking forward to just plugging everything in to the back of the three-lever switch. The metal shell connectors are not as compelling to me as the rubber version.

Should I be thinking about a different MV vehicle to use as a donor? M151 (would have turn signals, is that correct?)? I could use a Deuce harness but there would be an awful lot of snip-snip.
 
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