1992 glastron ski and fish mayfair pump wiring diagram

[davids boat]

i have a 19ft ski and fish 90hp boat with black switches on the dash for the bildge pump the pump is ok but no power to it when you push the switch on, can't access the swithes from behind dash to test, is there a way to remove swich from front of dash, or is there a wiring diagram to look at