Doing my boat projects and hit the blower switch and no blowers. Worked fine 2-3 weeks ago. Power at switch. Breakers ok. No power at the blowers. Blowers work fine off direct battery power. Neither the helm or power panel switch turns them on. Both switches light up though. I've messed with nothing in the engine room since they last worked. Any thoughts? I checked the helm switch and it switches fine with a meter on it.