I just bought a 1990 Wrangler knowing that the wiring harness was messed up. Once the Jeep was delivered, I realized that the whole engine compartment harness was burned along with the fuse block. I have a 4.2L inline 6 engine carbed with an AX-15 trans. I have found some 2.5L manual tranny wiring harnesses at my local junk yard, but wanted to know if that would work fine with my 4.2L? I have seen the painless whole wiring harness, but do not want to put $600 on a whole harness if I don't have to.
If you have the carter carb and stock setup then you will have some real issues putting together a harness in the engine to control everything. If someone has removed the ECM from the mix (that is nuttered) then it should be pretty simple as there isn't all that much wiring left. As for the 2.5, I doubt it as they are fuel injected. The 4.2 is carbed. If it were me, I'd go back to ground 0 and build up a wiring harness for everything and do a junkyard throttle body fuel injection conversion while I was at it. That way you get rid of the carter carb and all the junk that goes with it.
The wiring for a Nuttered stock Cart carb is exactly the same as for an aftermarket carb. Unless he want to spend an extra couple of hundred dollars or the carb is shot too, there is no good reason to replace it right now.
If he wants to throw as many parts as possible at it, he can replace the whole engine, ignition and wiring harness with a 4.0 out of a Cherokee.
If after he gets it running, he wants a different carb, then fine, but it doesn't have anything to do with his problem.
I don't really want to throw a new engine at is as it was completely rebuilt back in June before I purchased it. The jeep was running fine before a live wire fell out of its connector and shorted the whole harness to the fuse block. This is what the original owner told me. The wires under the dash should be ok, but I will need to get a fuse block and the engine compartment wiring in order to get it running again. I haven't found any junkyards around me that have a used wiring harness that isn't from a 2.5L fuel injected.
I have a 1990 Wrangler Islander 4.2 automatic w/air conditioning. My engine harness also burned along the firewall. Does anyone know where I can get an engine harness that won't need mods. I am a newbie and limited in my mechanical abilities. Thank you for any help.