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Unread 08-26-2009, 01:14 PM   #1
Foulplay
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Temp gauge and fuel gauge quit

BOTH gauges quit all at once. One day they both worked, the next day neither of them work. I had to assume that I had a loose wire on the back of the gauges but I can't find anything wrong there. I also assumed that I had blown a fuse, but all fuses are good. Where do I go from here?

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Last edited by Foulplay; 08-26-2009 at 03:30 PM..
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Unread 08-26-2009, 01:48 PM   #2
RetiredSERE
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Check and re-check your grounds.
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Unread 08-26-2009, 03:34 PM   #3
Foulplay
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From what I can tell, the ground is good but I don't really know where all to check. I know that the body of the gauge cluster itself is grounded but where else should I check?
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Unread 08-26-2009, 03:44 PM   #4
JimNut
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Check out these sites from John Strenk. Pretty much all the info you could ever want to learn about the gauges in a CJ.

Basic Troubleshooting for CJ gauges

CJ Speedometer Gauge Quick Test

The new Gauge Page
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Unread 08-26-2009, 07:51 PM   #5
John Strenk
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You will need a test light or a volt meter to continue testing...
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Unread 08-27-2009, 06:05 AM   #6
Foulplay
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Quote:
Originally Posted by John Strenk View Post
You will need a test light or a volt meter to continue testing...

Thanks for your help, I have both and I will try to check this stuff out today around lunch time. Otherwise it will have to wait until tomorrow.
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Unread 08-28-2009, 03:37 AM   #7
carnuck
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The temp gauge has a built in voltage regulator (bimetal spring)
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Unread 11-08-2012, 11:27 PM   #8
JRRCJ5
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Ground

The Speedometer housing grounds to the dash itself throught the four mounting nuts.
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Unread 11-09-2012, 02:48 AM   #9
scottg73
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Quote:
Originally Posted by carnuck View Post
The temp gauge has a built in voltage regulator (bimetal spring)

I think that's in the fuel gauge. It can cause both gauges to go out at once.
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Unread 11-09-2012, 04:35 AM   #10
John Strenk
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Yes, it's in the fuel gauge in the OEM gauges.

Some newer gauges just use a resistor to regulate the power going into the gauge. These have a resistor in both the fuel and temp gauge so they can operate seperatly.
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Unread 11-09-2012, 09:33 AM   #11
JRRCJ5
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Gauges

This is really not a reply. the trouble I'm have is replaced both gauges. Soon as I put them in the dash they quit working. Checked all grounds good grounds. Any thoughts what to do next. Oh yeah burn up temp gauge have to buy another one. Grounded peg and puff gone.
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Unread 11-09-2012, 10:43 AM   #12
John Strenk
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So you grounded one of the terminals on the temp gauge and it burned up the temp gauge right away or was the terminal in contact with the case and it burned up after a little while.

Got a picture of the replacement gauges?
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