Originally Posted by Threebutchers
IIRC...Behind the sink there should be power cable that needs to be connected up to the ceiling to make the overheads lights and fans operate. If the sink is not correctly raised / assembled some pop-ups have a safety switch in the sink base that cuts off the pump and lights to avoid a fire or plumbing mishap. Just some thoughts....
I forgot this was a popup.
That safety switch is usually the culprit.
On my Coleman, it was a rocker looking switch that got pressed when sink went down in place.
12V fuses is another possibility as stated.
Let us know what you find.