Gas Guage, Bilge Pump and Blower are all not working
 

I just bought a used Mastercraft 03 - X30. The Gas Guage, Bilge Pump and Blower are all not working. I assume these are all on the same circuit and their is a fuse or breaker issue but unable to locate it on the boat. Can someone tell me where it is or if they think it's some other issue?