Personally I would be hesitant to test for a shorted out sending unit by putting it into a tank of gas while there is power to it.
A spark at the moment the sending unit contacts the top of the tank might make for very bad day.
Might be a better idea to test for a short between the post on the sending unit and the top flange of it where the bolts go through on the bench without any power to it with an ohmmeter.
Last edited by 52Carl; 03/18/2024 12:50 AM.