Ωhm Posted July 16, 2020 Share Posted July 16, 2020 Let me know if you can or cannot open this. _mj1988electricalmanual_1.pdf Link to comment Share on other sites More sharing options...
fixerupper88 Posted July 16, 2020 Author Share Posted July 16, 2020 3 hours ago, JustEmptyEveryPocket said: Considering what you have done so far, including swapping TCUs, I'm thinking its a bad wire somewhere. Follow Ohms recommendations. He is the genius around here for tracking down wiring problems. I can believe it. I’m more of a part changer myself and I’ve done more electrical trouble shooting following his lead with this than I ever have before. guess ya gotta learn sometime. Link to comment Share on other sites More sharing options...
fixerupper88 Posted July 16, 2020 Author Share Posted July 16, 2020 49 minutes ago, Ωhm said: Let me know if you can or cannot open this. _mj1988electricalmanual_1.pdf 8.04 MB · 19 downloads I sure can. Holy crap that will come is handy. Thank you big time. Link to comment Share on other sites More sharing options...
Ωhm Posted July 16, 2020 Share Posted July 16, 2020 Compliments of the CC Forum. Helps everyone stay on the same page. It's not perfect, but its all we got. Link to comment Share on other sites More sharing options...
Pete M Posted July 16, 2020 Share Posted July 16, 2020 the link in my sig should have a thread that contains a lot of the digital manuals Link to comment Share on other sites More sharing options...
omega_rugal Posted July 16, 2020 Share Posted July 16, 2020 20 hours ago, fixerupper88 said: Now that you say that I did already try my buddy’s TCU and had the same result. a confirmed working TCU does the same? then you have a bad wire somewhere Quote Unless there was some kind of procedure needed other then just plugging it in. if it comes from the same year XJ/MJ then it should be plug n play, there are like 3 version that are not fully compatible, 88 - 95, mid 90s ones and 99+ ones Quote How do you check the harness? just find a diagram and check for continuity on each end? that would be the right procedure but you need a tester with some long cables since you already confirmed that the tranny does shift when the solenoids get power why don't you install a 2nd gear switch? or better yet, a manual shifter? Link to comment Share on other sites More sharing options...
fixerupper88 Posted September 9, 2020 Author Share Posted September 9, 2020 Well guys turns out was in fact the TCU. I had been watching a few on Ebay while driving by shifting manually and I finally scooped one up for 80 bucks and it works perfect. thanks for all the help. Is there any way to fix up my old one be reprogramming or something or should I just chunk it out? Link to comment Share on other sites More sharing options...
cruiser54 Posted September 9, 2020 Share Posted September 9, 2020 Ya know, TCUs from different years will interchange, plug in, and not work. The color of the harness end and TCU must match. I've seen blue and brown. Link to comment Share on other sites More sharing options...
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