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Old 06-05-2010, 09:20 AM   #1 (permalink)
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Fuel Gauge Help

I am trying to install my new dash with all new gauges, but I've hit a snag with my fuel gauge. The gauge goes to full tank no matter how much gas is in the tank. I have a 1982 CJ-7 with stock fuel tank and sending unit. I thought it was the sending unit so I bought a new one, but when I hooked it up, I get the same problem at the gauge. The gauge I am using is an Autometer 2642. It has a sender range of 73 ohms when empty and 10 ohms when full. Is this the wrong gauge for my Jeep or am I missing something along the way?
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Old 06-05-2010, 11:56 AM   #2 (permalink)
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I don't have a clue but I'm having the same problem. I'm still using my factory gauge though. I replaced my sending unit when I replaced my tank and it still doesn't work.
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Old 06-05-2010, 07:46 PM   #3 (permalink)
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Hook a multimeter to the wire from the sending unit that plugs into your gauge. Measure the resistance. If that reads correct-->something is up with gauge. Also, make sure you don't have the + and - switched around on the back of the gauge.

The trick to trouble shooting is to isolate parts of the system for test. A multimeter is your friend.
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Last edited by atblis; 08-12-2011 at 03:24 AM.
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