help need battery isolation switch and bilge pump

OK, not 100% sure but > 90% sure you have whats called a "computerized bilge pump" Also know as a piece of shizat. Anyway, how it works is on resistance. There is a timer circuit in the pump that cycles the pump every four minutes or so. If the impeller has water and the pump senses that resistance it will continue to run until that resistance is gone/ Capice?

To see if it works at all find the fuse on the battery or switch, it will likely be brown with a tracer and the fuse should be within 7" of the battery or switch. Unplug, wait a minute and re-plug it in. The pump should run for like 10 seconds. There after it should run a few seconds every four minutes or so.

The good is there are no floats to foul and one less wire connection.
The bad is that they suck, are unreliable and suck batteries flat just for fun.
Per ABYC that pump should be hot at all times. I'm betting Nautique has it wired through the Perko switch and it's dead with the switch off.
Its a new boat, tell the dealer you want a proper bilge pump that you can trust the boat to with the batteries off and check manually when you feel the need. Like when you are taking on water!

Hope I helped.