2000 2100

Aerator and fill on same selector switch. Pump out on different selector switch.

Aerators and pump outs work.

Fills (pump ins) do not. They do nothing. Occasionally, one makes one little electrical noise and instantly dies.

Are pump ins on separate pumps, fuses, etc?

Without removing the 4 batteries I can see two pumps for port side (bilge and pump out) but don't see a third. Starboard side I can't really see anything.

Thanks.