My old one already has my new speed sensor plug on it. That's the one of the 2 fixes I did on my original harness last night. And you're right, it was a piece of cake once you see it in action.
More reverse light woes
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My 97 4.0L has a bunch of differences compared to the 99 4.0L harness I was attempting to "swap" it with.
I cut my 97 harness not far after the Ground attachment near the dipstick. I then cut the 99 harness at the same place. I used the connector I linked earlier to give me all new wiring from there, back to the fuel pump.
I cut my 97 harness not far after the Ground attachment near the dipstick. I then cut the 99 harness at the same place. I used the connector I linked earlier to give me all new wiring from there, back to the fuel pump.
A theory on why that bundle of wires had all the insulation missing and were sort of stuck/melty together:
My transmission breather was puking over the summer a little bit. These wires feel a little greasy in an ATF sort of way. The section that shows damage is “near” the exhaust. Maybe being lightly coated in oil made them cook a little? Like I said, it’s a theory.
My transmission breather was puking over the summer a little bit. These wires feel a little greasy in an ATF sort of way. The section that shows damage is “near” the exhaust. Maybe being lightly coated in oil made them cook a little? Like I said, it’s a theory.
I don't know but I do know that modern electronic automatic transmissions have wires sitting straight in the ATF. Not sure if they have to use a special type of wire for that but I know they do soak in the ATF so I'd be surprised if that caused issues for you. Who knows. Maybe it exacerbated the damage from the exhaust heat, I have no idea.
Victory is mine.
I now have:
I was not able to take it out and drive it to see if the TCC code clears up, but I'm confident I'm out of the woods on this. In the meanwhile, please enjoy a 24 yr old harness with brand new split loom. For future reference, the large tube that contains the fattest section of this harness is 5/8", not 3/4". The concourse inspector is going to lose his shit when he sees what I've done.
Thanks to everybody who endured all 4 pages of my questions & troubleshooting attempts.
I now have:
- no start with the NSS unplugged (expected)
- start with the NSS plugged in, shifter in Park (didn't test Neutral)
- {forgot to test for no start while in D}
- Backup lights while in reverse
- No backup lights while not in reverse
- No #10 fuse blowing anymore
I was not able to take it out and drive it to see if the TCC code clears up, but I'm confident I'm out of the woods on this. In the meanwhile, please enjoy a 24 yr old harness with brand new split loom. For future reference, the large tube that contains the fattest section of this harness is 5/8", not 3/4". The concourse inspector is going to lose his shit when he sees what I've done.
Thanks to everybody who endured all 4 pages of my questions & troubleshooting attempts.
That's my biggest concern about the longevity of my TJ...and my 2001 F250... availability of affordable wiring harnesses.
Not that I can't grab one (for now) from a junkyard.
Just concerned...as I am sure you are...about the crispness of old wire.
-Mac
Not that I can't grab one (for now) from a junkyard.
Just concerned...as I am sure you are...about the crispness of old wire.
-Mac
Well, I had been concerned about that since I saw plenty of damage in that one area, but I'm now pretty well convinced there was an "event" of some sort that cause all that. Why would like 8 wires go bare in the middle of the harness at the exact same spot? Rodents? Possibly, although there was no visible damage to the loom, and there was some evidence of heat damage.
But there are 2 reasons why I'm not super concerned:
1. I re-loomed the run that goes to the taillights. That wire was soft and relatively clean...a few sections looked nearly brand new. I actually re-loomed everything I touched (which I highly recommend, my loom broke if it heard me talking about it from the other room) and found that the wiring was in great shape everywhere else.
2. It honestly was not at all hard to fix my issues. The general reaction here was pretty much "omg that's a flipping disaster, you should sell it for parts" but it took very little effort to clean up & resolve. Granted, I have the right supplies to make these fixes correctly and I enjoy the wiring aspect. If I have another electrical problem, I'm not the least bit concerned about fixing it with parts I have on hand.......
.....except connectors. Sourcing connectors hasn't been hard thus far, but you have to know what you're searching for which can be very hard, and they all seem to be in the $20-$30 range each. You can de-pin them but you can run into instances where you need to replace the individual terminal, so you have to have the correct ones on hand or know how to search for that inventory. Or get good at soldering or something. IDK. Absolute worst case scenario, you could just replace it with an entirely different connector, but even that isn't always directly possible — case in point PCM connections or sensors with an integrated connector (i.e. 4WD indicator or speedometer gear).
I found this supplier...sells lengths of stripped wire...
https://4rcustomswire.com/
So like you said...connectors plus wire and we're set...
-Mac
https://4rcustomswire.com/
So like you said...connectors plus wire and we're set...
-Mac
Nice find. If you're just doing a patching job you only have to buy 5', although it is about $1/ft. If you had a lot of tiny fixes to make, it could get expensive quickly, but still cheaper than calling Painless. I had to splice 8 different colors, so I'd have been in for ~$40 and only had to use 5% of what I bought. I guess that makes future repairs cheaper if you happen to need that same color/stripe.
It would also be nice to compile lists of wire colors needed, rough lengths and connectors needed. Pins, too.
I think WranglerFix was thinking about making harnesses, too.
-Mac
rustybottoms88
Member
Do you have a part number for this short harness? I am needing one or atleast the C154 male connector. I need to make a harness from a 46RH to the C154 on the main harness. Thanks
rustybottoms88
Member
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