johnj92131 Posted April 14, 2009 Share Posted April 14, 2009 Looking to replace damaged doors with full power doors from a Cherokee (91-96). My Comanche just has standard crank windows and no power locks. Question: Will I just be able to plug in the harness from new, full power doors to the existing body harness and have everything work "properly"? Or do I have to get the under dash harness from the donor Cherokee? Thanks for any help. JJ Link to comment Share on other sites More sharing options...
watchamakalit Posted April 14, 2009 Share Posted April 14, 2009 What year is your MJ? I have run into differences in the connectors used. I think the cut off is somewhere around 91 Link to comment Share on other sites More sharing options...
johnj92131 Posted April 14, 2009 Author Share Posted April 14, 2009 My truck is a 1991 and I "think" I have read that 91-94 are the same connectors. BUT...who knows? Since I have to replace one door anyway, this is a good time to upgrade to full power. (Or maybe even to 97 doors, with the better window and door seals). Link to comment Share on other sites More sharing options...
HOrnbrod Posted April 14, 2009 Share Posted April 14, 2009 The only "external" connections you will have to make are a 20A fused supply circuit (on the 10AWG TAN wire) at the left kick plate and ground if you use doors with the factory wiring harnesses. You of course will also need the cross-body harness from kickplate-to-kickplate to tie the doors together, or you can make your own crossbody harness. Link to comment Share on other sites More sharing options...
Boilermaker Posted April 14, 2009 Share Posted April 14, 2009 all the connectors on the door harness are the same from '91 thru '96...i'm currently using door harnesses from a '93 and a '95 connected to a cross body harness from a '92. My locks and window regulators came out of a '96. if you go with a factory cross body harness, make sure it is one from a '91 or '92. Starting in '93, (possibly 94) the door lock relays were moved from the harness to fuse box on the dash harness. Either way, look for a cross body harness with the relays and you should be fine. As hornbrod said, you only need the to do the run a 20A fused circuit on the cross body harness for the windows and door locks. The other tap (brown and white) is for the power mirrors (10A if you decide to hook those up). Link to comment Share on other sites More sharing options...
johnj92131 Posted April 14, 2009 Author Share Posted April 14, 2009 Good news then. All I need to do is pull the cross body harness for the windows, locks and mirrors from the donor at the yard at the same time I pull the doors. Also found a 2 door Cherokee with power windows and locks - will pull the switches from than and perhaps the bucket seats. Should set me back about $150. Not too bad. Thanks for the quick answers. JJ Link to comment Share on other sites More sharing options...
HOrnbrod Posted April 14, 2009 Share Posted April 14, 2009 If it has power mirrors, grab those too, as well as the console control switch and wiring. It's a whole lot easier doing the whole thing at once. :thumbsup: Link to comment Share on other sites More sharing options...
johnj92131 Posted September 7, 2009 Author Share Posted September 7, 2009 Well, seems I still need help getting the door locks and windows to work. Can someone point me to a good electrical diagram for the 1991 XJ or MJ on the net? Here is the situation: Replaced both doors on my MJ with a couple of front doors from an Xj with power windows and locks. (Doors from an 8/90 build date - should be M.Y. 1991)? Got a cross body harness from another 91 Cherokee with power doors and windows. Connected 12 volts to the tan 10AWG wire per instructions. Nothing at all happens. I must have missed the ground connection - but it looks like the window motor is grounded to the door frame and when the door is bolted to the truck, that should complete the circuit to ground. Or am I missing the ground connection? Any thoughts? John Link to comment Share on other sites More sharing options...
Boilermaker Posted September 7, 2009 Share Posted September 7, 2009 Can someone point me to a good electrical diagram for the 1991 XJ or MJ on the net? scans from the XJ/MJ 91 FSM for power mirrors, windows and door locks Link to comment Share on other sites More sharing options...
HOrnbrod Posted September 7, 2009 Share Posted September 7, 2009 I must have missed the ground connection - but it looks like the window motor is grounded to the door frame and when the door is bolted to the truck, that should complete the circuit to ground. Or am I missing the ground connection? Any thoughts? John I think you're missing the ground connection. You need to ground the BLK/GRY wire in the left kick panel where the TAN power wire is. Link to comment Share on other sites More sharing options...
johnj92131 Posted September 8, 2009 Author Share Posted September 8, 2009 Boilermaker - thanks for the scans - really helped. Hornbrod - found that gray/black wire and put it to ground. Found I had the harness to the master window switch upside down. Fixed it and put the ground wire down. Now I have the drivers window working. Later I will work on the passanger window and the door locks. Thanks John Link to comment Share on other sites More sharing options...
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