If electric, there may be an inline fuse buried in the wiring near the motor.
Another possibility, if you're on shore power, is that there's no power getting from the Power Converter to the battery, and the battery is run down. You can check this by turning off shore power. If your inside lights go out when shore power is off, you have a tripped 12V DC Mini-circuit breaker. There's a row of these little circuit breakers on a buss bar near the battery. The breakers may be covered by a red rubber boot. One of the breakers has a teeny-tiny reset button. I've attached some pictures.