My old C-15A had one ford tank and one Chev tank. Of course the senders didn't cross match, so I had to have one Chev and one Ford sender, but they needed to both go into the same gauge.
Of course the ohms were different between them, so a full Chev tank reading looked like 1/4 tank when switched ot the Ford tank.
I had to add a resister to the lower circuit ( can't remember now) and then calibrate it to work with the chev gauge. I believe I used a small potentiometer to tweak the settings.
Any one else run into this situation?
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