If all you did was change the float switch and you didn't wire anything differently you have a bad switch. The auto side of it is bad. The float switch is in the 12V line.
2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
Bitter Gun Owner