AMC86Kid Posted May 29, 2020 Share Posted May 29, 2020 What is this part of the back of the gauge for , power? ground ? lighting? Link to comment Share on other sites More sharing options...
Green Mesa XJ Posted May 30, 2020 Share Posted May 30, 2020 What the hell? Where is the printed circuit?I’d have to dig out the electrical manual. it’s probably going to be a common ground, maybe. Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
Warren Mohler Posted May 30, 2020 Share Posted May 30, 2020 1 hour ago, Green Mesa XJ said: What the hell? Where is the printed circuit? This is a new one on me! I've worked on these since they came out and never saw direct wired gauge cluster Link to comment Share on other sites More sharing options...
eaglescout526 Posted May 30, 2020 Share Posted May 30, 2020 He did away with the printed circuit and wired everything directly. Kinda impressive actually. Link to comment Share on other sites More sharing options...
Green Mesa XJ Posted May 30, 2020 Share Posted May 30, 2020 Explains some of the trouble with gauges. I’ve had trouble with the 84-86 printed circuits going bad. Peeling apart and degrading. There were no replacements available for the printed circuits in the early 2000s i was able to get a spare printed circuit for the 87 or 88- 90 full instrument, Jeep was clearing it out for $12. I thought maybe it’d be close enough to work on the 86 cluster, it’s not. Eventually we bought 89-90 clusters to replace it and never had trouble with their printed circuits. Honestly that’s what I’d do here. As long as the dash harness is intact it’s plug and play. All of those gauges should come back to life accurately.My first car I wired a cluster like this, original cluster didn’t have a factory tach and I wanted one, took a cluster out of another same era model and it didn’t plug in so I wired it directly, was not a good solution, worked for a bit then got lest dependable if I hit a bump. Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
Green Mesa XJ Posted May 30, 2020 Share Posted May 30, 2020 Here is the 1986 electrical book,I’d have to look at the circuit but I think it’s a common ground most of the light and gauges share. But what’s in the book is not explicitly clearSent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
AMC86Kid Posted May 30, 2020 Author Share Posted May 30, 2020 I will try to hook it up to a ground and see if that changes anything Link to comment Share on other sites More sharing options...
Green Mesa XJ Posted May 30, 2020 Share Posted May 30, 2020 Find a cheap cluster out of a 1988-90 and throw that in, as long as your engine and dash harness are still factory/intact not cut up it will work.It’s harder to find 84-early87 style like that one is and I never could find a good one when I search years ago . Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
Big_Mark Posted May 30, 2020 Share Posted May 30, 2020 Add on question, what is the magic to detach the speedo cable from the gauge? I gather there is a clip to squeeze but from where or what angle? Link to comment Share on other sites More sharing options...
Eagle Posted May 31, 2020 Share Posted May 31, 2020 5 hours ago, Big_Mark said: Add on question, what is the magic to detach the speedo cable from the gauge? I gather there is a clip to squeeze but from where or what angle? What year? It makes a difference. Link to comment Share on other sites More sharing options...
Green Mesa XJ Posted May 31, 2020 Share Posted May 31, 2020 I looked at the 89 cluster a little different but the way it’s routed it’s probably a ground. I can’t find a good breakdown of the c1 plug in the cluster. The cluster plug is the same 1984-90, one of my books ought to have it Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
Big_Mark Posted June 1, 2020 Share Posted June 1, 2020 On 5/30/2020 at 6:27 PM, Eagle said: What year? It makes a difference. Thanks for the response, it's an 1989, I have large hands and wrists so I may just drop the steering column to gain access. Link to comment Share on other sites More sharing options...
JustEmptyEveryPocket Posted June 1, 2020 Share Posted June 1, 2020 Did you find the bolt that holds the speedo cable by the driver side control arm? If you remove it from there you can push way more of the cable up into the cab, thereby making the backside of the cluster much easier to see and get to. Link to comment Share on other sites More sharing options...
Eagle Posted June 2, 2020 Share Posted June 2, 2020 20 hours ago, Big_Mark said: Thanks for the response, it's an 1989, I have large hands and wrists so I may just drop the steering column to gain access. Your speedo cable is attached with a white, nylon clip. On two sides there are tabs that you squeeze together, allowing the cable to slide off the head. Link to comment Share on other sites More sharing options...
Big_Mark Posted June 3, 2020 Share Posted June 3, 2020 Thanks for the tips "J.E.E.P." and Eagle I should be able to get it out easier with these tips. Link to comment Share on other sites More sharing options...
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