If you have power leaving the breaker, then remove the carpeted cover on the rear port side to expose the pumps and power distribution mounted on a panel. Check the power connector to make sure it is snapped all the way in. It may not be snapped in all the way or has fallen out. The pumps and wakeplate are powered thru it.
I have a 14 Mojo and this happened to me. I'm not sure if they are the same on a 15.