I have a 2012 Blue Wave 1902 Evolution and have a question about the bilge pump.

I noticed a few weeks ago that it was holding a lot of water and the bilge never came on. There are 2 switches on the dash marked bilge. One of them would light up without being switch to the on position (I assume it is switched on by water level in the hull) and I could hear it run but no water was pumped out. The other one lights up when switched to the on position but no audible sound and again no water is pumped out. This weekend after a trip to the lake I was messing with it and figured out that there was a blockage in the hose. Cleared the hose and it now comes on automatically based on water level in the hull and pumps the water out. My question is what is the other switch for? Is there supposed to be another bilge pump in there somewhere under the deck? I can only find the one and am not hearing anything when I switch the second switch to the on position. Guess that is one of the questions I should have asked the salesman when I bought it but it.

Thanks in advance for any comments.

One switch is the auto bilge circuit.