TFC Posted May 18, 2019 Report Share Posted May 18, 2019 Fooling around with the gas gauge this morning, trouble shooting this system. There are few indication that the gauge mount is to be isolated from the ground of the vehicle(paper gasket and paper washers under mounting screws). Any insight on this will be appreciated. Quote Link to comment Share on other sites More sharing options...
Merle Coggins Posted May 18, 2019 Report Share Posted May 18, 2019 I don’t believe it needs to be. I believe it was more sealing against dust intrusion. Quote Link to comment Share on other sites More sharing options...
B1B Keven Posted May 18, 2019 Report Share Posted May 18, 2019 Merle's right. Disconnect the wires from one of the posts of the fuel gauge and read across both posts with an ohm meter. You should get a reading between 25 and 45 ohms. Quote Link to comment Share on other sites More sharing options...
TFC Posted May 18, 2019 Author Report Share Posted May 18, 2019 Thanks guys Merle, Looking over the internal wiring of the gauge I can see that it actually requires grounding to make connection to end of one of the coils. Keven, Yes I read 27 ohms between the posts , so that lines up. What I'm not sure about now is which terminal is tied to the sender unit and which is tied to the power from the ignition switch. SW - ties to ignition switch(power)? GA - ties to sender unit? Also wondering what the max/min resistance of the sender unit should be, mine is currently reading 93 ohm with maybe 4/5 gallons in the tank Quote Link to comment Share on other sites More sharing options...
B1B Keven Posted May 19, 2019 Report Share Posted May 19, 2019 You've got the terminals correct and it sounds like the sending unit is working. Some folks here have added a ground strap from the sending unit to the frame. Quote Link to comment Share on other sites More sharing options...
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