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Swaping a 4.2 out of a 1988 Wrangler for a 4.0 out of a 1994 Wrangler. how do I install the wiring harness?

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Use harness from motor you are using. fuse box pcm etc.

Posted on Aug 26, 2008

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I need a diagram to put a wiring harness from a 1994 4.0 jeep wrangler in a 1993 4.0 jeep wrangler


check chiltons manuals, they usually have wiring diagrams in the back of them to show you all you need. its hard to find online ones. you always have to pay for those ones

Mar 21, 2012 | 1994 Jeep Wrangler

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Signal lights don't work


Are you check fuses and flasher device? Also bulbs and voltage at wires harnesses.

Mar 07, 2011 | 1994 Jeep Wrangler

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Everything on my dash quit working


It is the plug in harness just behind the instrument panel! I had the same problem! Try this for quit fix. Hit both sides of the dash on both sides of the steering wheel. (causes harness to make connections) try a couple of times. Long term fix remove dash clean and slightly bend prongs on wiring harness.

Dec 11, 2010 | 1994 Jeep Wrangler

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order is 153624 gap is .35 remove one wire at a time and you won't have a problem putting the wires back on.

May 13, 2010 | 1994 Jeep Wrangler

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1994 jeep wrangler 6 cyl 5 spd no start


have u ck out the ignition switch [not the key & tumblers],, or the neutral safety switch to see if u have power ,,also seen broken wire at solenoid on starter too,,hope it helped,,

Apr 05, 2010 | 1994 Jeep Wrangler

1 Answer

My jeep wrangler 1994 manual brake light stays on after a release the handle.


That light usually has two functions: (1) Parking brake is set and (2) hydraulic brakes system failure. I would assume that you have had a failure in the regular brake system, and trouble shoot that. Check fluid level, then make sure all 4 wheels are applying the brakes. Most systems have a split, so you could get a failure of say the front brakes and still have rear, or vice versa, so you might not realize at first that you have a failure, just a longer stopping distance.

Other option is a failure (short) of the switch or wiring harness that is activated by the setting of the parking brake.

Oct 08, 2009 | 1994 Jeep Wrangler

2 Answers

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is it the straight six? if so first disconnect the battery then there should be 2 bolt 13 or 14 mm. take wires off. then reverse for install.

Mar 11, 2009 | 1994 Jeep Wrangler

1 Answer

I have a 1994 V-6 engine with all the wiring intact, has 2 wiring harnesses going through firewall, I want to splice that 1994 wiring into the existing 1989 interior wiring for the ignition and basics,...


That's gonna take a good test light and some serious patience. First thing you gotta do is FORGET trying to match the colors,ain't gonna happen. Find out which wire is hooked to what and splice it to the stock wire that does the same job. I'd use **** connectors,just don't cut the wire off of the '94 harness at the plug. Give yourself a few inches in case you ever want to do another engine swap. It's a lot easier to sell an engine if you can re-attach the stock harness for the new owner. Capiche? Good luck, let me know how it comes out at wbrt55@aol.com. Bart

Sep 28, 2008 | 1989 Jeep Wrangler

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