1994 Jeep Wrangler Q&A

1994 Jeep Wrangler Question: Wiring Harness

Will a 1995 harness work on my 1994 ? After replacing engine will not turn over ,am I missing something? HELP -
Answer 1
There a couple ways to find out if the harnesses are the same. You can try to call the dealer (or a Jeep dismantler) and ask the parts guy to check the part numbers for the engine harness. Another way is to compare the wiring diagrams between the 94 and 95. It might be safe to assume if all the connectors plugged in, the harnesses are similar. First, check ALL of your grounds to the body and engine. Check and make sure all of the fuses are installed and OK. Is the battery good? Are the battery cables good? You know for certain the starter is good? Make sure the starter relay and ignition switch are good if everything else is good. Since you replaced the engine harness, check that the connections are secure. Another great resource for Jeep owners that I've used is here: http://www.jeepsunlimited.com/ -
Comment 1
I can take the cover off of the starter relay and actuate it and the engine turns over . The harness had a couple of extra connectors . I cannot get a ground on the power control unit . Could the ECU be causing this??Thanks for your help.... -
Comment 2
Does the starter relay actuate when it sees 12 volts? It's hard to say about the extra connectors. If your Jeep is a manual, and the harness is a '95, it's possible that harness was for an auto transmission. On the toyota's, the auto trans cars will have connectors for a neutral safety switch and a couple other things I believe. The ECU might be causing this if it's looking for a safety switch or clutch switch. You're using your original ECU right? To really be sure about the ECU, you'll need to check the pin configuration and trace where the extra wires are going. Wiring diagrams are going to help immensely to check that stuff. I just looked and Autozone's website and they have all the wiring diagrams for the YJ Wranglers in the repair guides section. It's free but you'll need to enter your vehicle and go to the repair guides section. Direct linking never seems to work. http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528008ad56 you'll need to copy/paste that entire link. The 94-95 wiring diagrams look to be the shared and the wires are color coded on the diagram so you should be able to trace down the problem. -
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