Join Date: Mar 2007
Location: Bob Barker lived here.
Here's a quote from sevenandeights on cjoffroad. (can I do that?)
Helpful when you're using the donor harness.
"If you can I would wait until you get the FSM. This way you can check out the wiring diagrams and the schematics that show the locations of most of the major connectors. At the very least study your current harness and maybe even take it with you for comparison.
This is from memory so don't take it as gospel:
Starting at the front driver's side . . .
1.) The harness terminates at the PCM (I would ask the yard for a "complete harness" and definitely try to get the PCM as a back-up. The front light bundle and electric fan lead are here also.
2.) Going back toward the firewall should be the diagnostic port and then some ABS stuff that hooks into the proportioning valve
3.) Next up is the firewall bulkhead connector. Definitely get this - you most likely will not use it but it helps when it comes to wiring because the pin outs are in the FSM. It allows you to test your wiring by just crimping on some female spade terminals to plug into the connector.
4.) Going along the firewall toward the passenger side will be a grommet that leads to the gauges. If the XJ is pretty torn apart you can go behind the dash and unplug the connectors and pull these wires out for completeness but you should not need any of this stuff and could cut it off.
5.) Next is the MAP sensor on the firewall.
6.) Then comes the fuel rail harness and CPS. This harness is kinda a pain to get off because it uses plastic connectors with teeth that fit over the valve cover bolts. The injectors themselves are a pain too. You will need a small flat head screw driver to pop the retaining rings off. MAKE SURE TO LABEL THE INJECTORS AS THEY COME OFF! You can disconnect the CPS unless they want to give to you (I told my yard that it was part the "complete harness" just like the PCM).
7.) I think the next thing should be the tranny wiring. My donor had an AW4 auto so there was a harness that went through the firewall to the backside of the passenger's dash where it hooked up to the auto computer (again, part of the "complete harness"). There should also be a connector for the VSS here.
8.) The next thing should be a ground at the engine block near the oil dipstick tube and a connector to the distributor.
9.) You should now be to the passenger side fender and there will be a connector to the wiper pump and maybe the cruise control and A/C. My memory is fading!
10.) AT LAST THE PDC! The PDC has been described above and will have a 6 G red wire attached to it from the battery. Right before the PDC there are a bunch of wires that go to the alternator, starter, and coil.
That's all I can remember. I think you will be safe if you cut every wire that goes through the firewall. Take your time and label everything or take pictures. I had never seen a 4.0L engine when I pulled my harness so I was pretty meticulous with the disassembly.
Don't forget the accelerator cable if you haven't got one yet."
Throw the bums out!
48 CJ-2A, Bone stock except it has Allstate locking hubs.
86 CJ-7, 4.0 HO, AX-15, D-30, AMC-20
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