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Old 03-08-2020, 05:40 PM   #80
Hart_Rod
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Join Date: Apr 2005
Location: Pensacola, FL
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Re: 1973-1991 Dual fuel tank systems theory of operation

Quote:
Originally Posted by hatzie View Post
So the gauge is working.

It really sounds like the LH sender is tied directly to the gauge bypassing the sender switch in the valve.
Well after reading this thread about 100 times, studying multiple diagrams and thinking about everything that Hatzie has told me to look at, I finally figured it out. Somebody had two of the connectors plugged in wrong! Both of these connectors are by the LH tank and the wire colors are very similar (see diagram below). It's crazy that everything still worked (other than the RH tank reading incorrectly). I plugged the connectors in correctly and everything works perfect now. Thanks everyone for all the help, especially Hatzie!
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Last edited by Hart_Rod; 03-09-2020 at 12:30 PM.
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