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Old 01-13-2004, 10:07 PM   #1
drinkyouroj
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Question CJ Speedometer cluster in YJ

Hi all...slight problem in my 1993 Wrangler YJ:

Started off simple enough: the light in my speedometer went out, so I figured I just needed to replace the bulbs. I did that...didn't work. I tried swapping the bulb sockets with those in the tach...the tach still worked, speedometer still didn't. I went for a while not being able to see my speedo in the dark, then decided to talk to my buddy who has a spare CJ he uses for parts. He gave me the speedo out of his CJ.

This is partially good news, because I like the speedos out of the CJ's much more...what with the gas and temp gauge in the cluster and all. It's classy. Only problem is, my YJ has the full instrument cluster, with the tach and speedo and idiot lights all together on the plastic harness, with the ribbon cable tying them all together. Any way I can lose that to hook up the speedometer cluster from the CJ?

Thanks in advance for any advice.
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Old 01-13-2004, 10:18 PM   #2
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I have always wanted to swap a CJ dash set up into my YJ, I saw this article a couple years ago:

http://www.off-road.com/jeep/swb/articles/dash.htm

pretty informative, but so far I haven't been able to justify the work.
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Old 01-14-2004, 08:30 PM   #3
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Thanks MacGyver...

I looked over this link...this actually does look like a very nice project to try and pull off. Unfortunately, there aren't any specifics mentioned about the wiring of the gauges; if I read correctly, he used new gauges in his project, not actual gauges ripped from the CJ.

My problem is that the instrument cluster in my 93 YJ has that large connector which runs into a ribbon that powers my tach, idiot lights, and speedo. The gauges in my car don't have independent wiring, as the CJ speedo cluster does.

I may be able to figure it out if anyone has come across CJ and YJ wiring diagrams...any suggestions?

thanks again for all your help, folks! cheers to figuring this out
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Old 01-14-2004, 10:39 PM   #4
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heres where I got the numbers for CJ:
http://www.jeeptech.com/electrical/gauges/

and the numbers for the YJ from the previous post in this thread


The fuel gauge in a CJ is backwards from the YJ...
in a CJ
73 ohms Empty
23 ohms 1/2 tank
10 ohms Full

YJ has a
88 ohms Empty.
44 ohms 1/2 tank
00 ohms Full

so you need to change the level of resistance that the gauge reads from the tank. I am no electrical engineer, but maybe try hooking the CJ fuel sending unit into your YJ... As I type this I am confusing myself

I am going to keep researching it. I will ask around and if I ever do get a good answer I will post it on several forums, because I know this has been a topic in a few places. Its got to be possible however.

Sorry,

Jason
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Old 01-21-2004, 08:18 AM   #5
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Thanks again MacGyver.

I, too, am sure that it must be possible, though I haven't yet found any way to do so...the fuel sender was something I had read about before. Since I am no electrical engineer, either, I think I may be best suited to go to the dealership and see if they can order me a new instrument cluster ribbon-thing. Not a big deal.

On a side note, got new tires and wheels for the YJ last Saturday...Discount Tire gave me a nice deal, as the tires had already been mounted on 15x8 rims. New tires are 31x10.50, a considerable step up from the stock 28's.
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Old 10-30-2008, 01:34 PM   #6
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I don't know if anyone is still looking at this thread, but my understanding is that the cj fuel and temp gauges operate on a 9 volt system. Somewhere there is a wire that reduces the voltage.
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Old 11-25-2008, 04:37 AM   #7
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I've also read about this thick wire that can reduce voltage...
Can't remember the sites....
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