Bilge Pump Wiring

I had my bilge pump replaced before this trip. It will not turn off even with the key out. It has a brown and black wire coming off of it, and there are 2 brown and a black coming from the boat, 1 marked "bilge pump". There is a black box beside the bilge pump that says "vent cover" on the top of it and it has 2 brown wires coming off of it, 1 marked "attach to bilge pump lead". The 2 marked wires were not connected to each other. Does anyone know how this should be wired? There are are 3 wires from the boat and 4 from the bilge pump and mysterious black box. Thanks for any help!!!

Sounds like the box is a float switch and it's stuck in the "on" position.