Fuel gauge sending unit

[junebug]

Ok so I have replaced two sending units in the past year and it tired of pulling the tank! What could be killing them?!


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[66 Bronco Dave]

You are getting to many volts. 12 volts is to much. I think you need some sort of resistor at least that's I read on a ford forum. 60s to 70s sending units ran low volts through some resister I think in voltage regulator I'll try to get you the article

 

[66 Bronco Dave]

http://www.fordification.com/tech/fuel-sending-units.htm

 

[junebug]

Thank you bronco Dave!


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[garberz]

The fuel sending unit only varies the resistance to ground. There's no voltage going to the sending unit. The instrument voltage regulator supplies a 5.5 pulsed voltage to the fuel gauge, and the sending unit supplies the ground. The varying resistance in the ground is what makes the gauge read differently. 10 ohms is full, 72 ohms is empty.

Mark

 

[66 Bronco Dave]

Mark is the guy who sounds like he knows what's going on. Good luck

 

[garberz]

Mark is the guy who sounds like he knows what's going on. Good luck

They're a very simple system. I still don't have an answer to his question. Must be cheap Chinese replacement parts. I'd buy from another source the third time around.

Mark

 

[junebug]

Thanks mark...unfortunately my electrical system is still an original cut up mess from over lord knows how many owners. I will try one more time lol. Hopefully it's just a cheap part problem.


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