[SoCalEDC]

A few options. Should be simple to diagnose.

First thing test the battery to see if it has the minimum required voltage to power the pump, and it isn't dead despite being charged.

Next inspect all of the wires between the battery terminals and the pump. make sure there are no breaks in any of them.

Then test the switch for continuity on both sides when it is in the on position
--if you have continuity, check the wire between the switch and the pump again, inspect it for any breaks, check each end of that wire for continuity. If you have continuity from the hot side of the switch all the way to the pump then you have a pump problem.

If there is a break in continuity from one side of the switch to the other you have a bad switch

If there is a break in continuity from the switch to the pump then the wire is not transmitting power to the pump

Check these things and see if it fixes the problem. If you check the switch and wire and fix them, and it still doesn't work, then you had both a power/continuity problem and a pump problem.