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Unread 07-10-2013, 01:45 PM   #1
Rotorhead
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1982 CJ7 
 
Join Date: Nov 2001
Location: Bozeman, Montana
Posts: 11
Factory CJ fuel gauge problems...

Hello all,

I have driven CJs for 20 years and never had a problem with the factory fuel gauge--lucky me. My Jeep has a Painless wiring harness in it. Recently I took the dash apart looking for a parasitic drain but when I put it back together, the gauges did not work. Having gone through gauge testing online, everything pointed me to the fuel sender. I dropped the tank and replaced the sender and the gauges. Verified my ground to the frame is good. When I hooked it back up it still blows the 'Gauges' fuse. With the speedometer out of the dash the gas gauge reads full. As soon as I ground the speedometer case, it blows the fuse. Ready to set the Jeep on fire and roll it into the street! Please help!

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98 Grand Cherokee 5.9L
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Unread 07-10-2013, 03:10 PM   #2
Hawk4097
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1986 CJ7 
 
Join Date: May 2011
Location: Elizabethtown, Kentucky
Posts: 194
You have a short somewhere. check all wiring and make sure there aren't any hot wires grounding out
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Unread 07-10-2013, 06:29 PM   #3
Rotorhead
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1982 CJ7 
 
Join Date: Nov 2001
Location: Bozeman, Montana
Posts: 11
When I went through the dash, I added a bus bar connected to the battery and grounded all my dash items to it. Pretty sure that the problem is in the fuel gauge. I connected another 2 1/16" fuel gauge to the wiring and it works fine. I have tried 2 OE fuel gauges with the same effect. I ordered the Omix aftermarket gauge set and it does the same. If you have the speedo cluster not grounded, the gauge goes to full and stays there. Once you ground the cluster or connect the power wire to the I terminal on the fuel gauge it blows the fuse. I am half tempted to punch a hole in the dash and wire in a 2 1/16" aftermarket gauge and call it good. Would rather keep my dash stock though...
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Unread 07-10-2013, 07:13 PM   #4
gogop66
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1986 CJ7 
 
Join Date: Sep 2012
Location: Ventura, CA
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I have heard of a lot of issues related to the ground or shared ground. I would check all of your new grounds against a known good ground. (on the fuel and temp gauges)
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Unread 07-11-2013, 09:32 AM   #5
John Strenk
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1976 CJ5 
 
Join Date: Feb 2005
Location: Shalersville Ohio
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did you mess with the screws on the back of the gauges?

tighten them up or anything?

IS the Fuel Gauge aligned properly in the housing?

Did you check your resistance to ground
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Unread 07-12-2013, 09:24 AM   #6
Rotorhead
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1982 CJ7 
 
Join Date: Nov 2001
Location: Bozeman, Montana
Posts: 11
Cleaned up the ground on the back of the fuel gauge. It works for now. Temp gauge is still inop though. Will plan on fixing that once the weather turns cruddy again. Summer in MT is too nice to not have the Jeep running... Thanks for your help guys!
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