Sea Ray

On my 390 MY the sending units are under the carpet. Look directly above the sending units from the ER, u should see where the cutouts are. There is a lot of info on testing sending units on the web. My issue wound up being a loose ground wire, with some corrosion where the ground wire connects to the boat ground wire.

The sending unit is mounted on top of the tank close to side of hull. Seat and hood had to be removed as it is long part.

from the utube video I watched it is under the aft cabin and the side wall needs to be moved