Bow Thruster

I have a 2004 342 with a bow thruster. When I put it in the water I tried to turn it on but when I pressed the button the light flashed but didn’t stay on. I thought it could be that I needed a new battery but when I changed the battery it did the same thing. Does anyone have an idea of what it could be? Thank you
Comments
My Sleipner thruster has a low amperage run to the switch and is high amperage to the thruster motor. I imagine yours is the same. Sounds like your high amperage circuit isn’t powered.