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Discussion Starter #1
Just wondering if anyone knows the voltage going to the fuel sending unit in a 3rd gen or how exactly it works , read an article saying there is 12 volts in but only 4 volts out and that the gauge works by ohms , and the sending unit acts as a potentionometer but that really doesn't correct, just trying to get my gauge to work ,probably another ground issue (hoping)
 

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1966 El Camino
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the gauge indeed does read ohms, 0-90 if I'm not mistaken, or at least thats the range that 60-70's cars use. What does your gauge read now? if it pegs its usually a ground issue, if its inaccurate but moves, its likely to be a sender problem.
 

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Senior Member
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932 Posts
Discussion Starter #3
the gauge indeed does read ohms, 0-90 if I'm not mistaken, or at least thats the range that 60-70's cars use. What does your gauge read now? if it pegs its usually a ground issue, if its inaccurate but moves, its likely to be a sender problem.

It doesn't move at all , all the issues from the 72 have been from it sitting for 4 years and seem to be ground and connection issues ,I will reroute and clean up the ground first and see it that helps
 
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