Having trouble with my fuel gauge. The gauge constantly sits below E. I can ground the sender wire and it jumps to full. I have a notion that the sender is not grounded. I can’t seem to find where the sender is grounded though. Do most boat builders run the ground wire all the way back to the console to ground the sender?
Test the sending unit by using a jumper ground. If it works, run a new ground. If it does not, replace the sending unit.
Tall Sail Marine
the sender is not grounded
you don’t test the sender with a ground jumper
the sender uses ohm resistance through the ground circuit on the gauge
you test the gauge by shorting the pink sender wire to ground.
you did that and the gauge functions properly.
either your wire or your sender is bad.
we would just replace them both, but if you want to test, cut the wires at the connection between the sender and the gauge wires, and touch them together.
if you get the same result as you did when you jumped the gauge, the wires are good and you need a new sender
if it doesn’t, its just as likely that the pink wire (which is also part of the ground circuit) could be bad
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It ended up being a ground that was actually hooked to the positive post by mistake when a battery was replaced. I was surprised that A it didn’t fry the gauge and B it was the only thing that I noticed that didn’t work.
Mayhem
Pioneer 197