Quote:
Originally Posted by Zonaman
Did pull that sending unit. It went from 4 to 96 Ohms. Knew it.
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There's gotta be something wrong with that new gauge.
I took some more measurements on my OEM gauge. I believe there are two windings inside the gauge that push the needle in opposite directions. One winding is between the power post and tan post, and it pushes the needle toward Empty. The other winding is between the tan post and the ground post, and it pushes the needle toward Full. With the tan wire disconnected, the needle goes way past Full (3:00) and I measured 8.55V on the tan post.
Since your needle isn't moving toward Full, this might be because the empty-pushing winding is pushing too hard, or the full-pushing winding is too weak. You measured only 57 Ohms for the full-pushing winding resistance, whereas I measured 103 Ohms. That seems odd to me.