How difficult is to replace wiring harness? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 07-30-2002, 05:35 PM
mangu43
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How difficult is to replace wiring harness?

Ok, i kept pulling appart the wiring in my 77 cj, got behind the dash and just cried. All i could see was splices and wires that go nowhere. I want to replace the harness, but at 430$, that seems a bit steep. anyone know of a cheaper yet still efective kit other than painless wiring? also, this is strictly a summer rig, so i don't even need half the junk, like heating, cooling, interior lights. all i want is head lights, signals (inspection stuff) and it to start. i no my stating problem lies in the capacitor, and solenoid--not sure how things are to be hooked up and its hard to tell by the diagram in the chilton's, anyone have advice? thanks mangu
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post #2 of (permalink) Old 07-30-2002, 05:40 PM
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Re: How difficult is to replace wiring harness?

Don't feel too bad. Behind the dash of my CJ looks very similar. In fact I stuck my hand up behind it one day and got a shock from something. Still don't know what, but I should fix it. I'm hoping for a new wiring harness sometime, so I started the "make nicks jeep cooler fund". Sadly no donations as of yet. Good luck with the wiring.
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post #3 of (permalink) Old 07-30-2002, 06:05 PM
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Re: How difficult is to replace wiring harness?

Rewiring even something as simple as an old Jeep isn't going to be a snap, no matter what. If you're not good enough with following a wiring diagram to make sense out of what you have, you're going to need a kit. The odds of finding a good harness in a junkyard are close to zero.
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post #4 of (permalink) Old 07-30-2002, 08:35 PM
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Re: How difficult is to replace wiring harness?

You can try and fix it yourself. Just pull your entire dash out including your fuse box. Put it on a work bench and go at it. Easier then it sounds could do it in a weekend.
post #5 of (permalink) Old 07-30-2002, 09:36 PM
 
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Re: How difficult is to replace wiring harness?

You will have to learn basic wiring whether you buy, replace or rebuild.
I am told Hayes Manuals have the best diagrams.
What looks like spagetti now is repairable if you study it long and hard enough ... one circuit at at time. Just start.
Take the manuals to bed, to the pot, doctor's waiting room ... read, study, and trace those wires. Try to understand which are hot, which are switched and if they switch on the current to go to something or if the switch is to ground to activate an already hot circuit.
There are good used harnesses out there ... I just sold a very good one from a '80 CJ for $50.00
Actually, all a harness is is a fuse box with a lot of wires coming out of it... same thing you have.
Once you begin to understand the circuitry you simply replace the bad wires and eleminate the old add-on or unwanted ones.
It's just one of those Jeep things ... and another skill to master ...
Here's mine afer a rewire ...

It took study and time but believe it or not, I learned and know every circuit!

P.S. I just remembered that I still have a '77 CJ-7 dash with all the wiring still conneted to all the switches and lamps ... so e-mail me if you need some detailed pics of what it is supposed to look like back there.[img]images/icons/smile.gif[/img]
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post #6 of (permalink) Old 07-30-2002, 10:45 PM
 
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Re: How difficult is to replace wiring harness?

i just ripped all teh wires out of mine. went to radio shack and got a bunch of relays, went to auto zone and got some of those fuse holders and a spool of 16 guage and a spool of 8 gauge and redid everything myself. youll also need switches.
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