It's one of the 20a curcuit breakers, it *may* be under the hood mounted on the driver's side fender. It's a small self resetting circuit breaker if it's mounted there.
Other things, are your house batteries connected? Is the 12v cutoff switch in the side entryway turned off? Did the electric waste valves work? Check the wiring on the toggle switch, one side should read 12v DC to ground. Check the wiring between the toggle switch and the macerator.