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Unread 02-02-2013, 03:29 PM   #1
davbytrace
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1979 CJ7 
 
Join Date: May 2011
Location: clinton, MS
Posts: 479
Fuel Gauge Reads Backward..maybe?

1979 CJ7 with 304.

I installed a VDO fuel Gauge in the dash. I verified that the gauge is appropriate for the ohm range that the CJ sender operates at. When I installed it, the tank was 1/2 full, and the gauge read 1/2 as it should.

When I filled it up, the gauge went to zero.

Has anybody seen this happen? Any clues?

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Unread 02-02-2013, 04:46 PM   #2
John Strenk
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1976 CJ5 
 
Join Date: Feb 2005
Location: Shalersville Ohio
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Might be the right resistance range but backwards.

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Unread 02-02-2013, 09:09 PM   #3
davbytrace
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1979 CJ7 
 
Join Date: May 2011
Location: clinton, MS
Posts: 479
Soooo....could I hook the signal to the negative and ground to the signal and get a correct reading?
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Unread 02-03-2013, 04:32 AM   #4
John Strenk
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1976 CJ5 
 
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Location: Shalersville Ohio
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Chances are no.

Most likely reversing the voltage will drive the meter into the opposite direction.

You could install a YJ sender. They have the opposite resistance range.

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