ukester wrote:What are the thick pair of black wires for? Do you also have red/white wires and if so where do they go?
The two 12 gauge black wires (the thick pair of black wires) are connected to the "LINE" side of the Bilge Pump circuit breakers in my overhead 12 volt DC accessory panel, these two thick black wires then tie into the terminal strips mounted under my main station helm in the salon and then onto my two bilge pump switches at the helm, The two switches power two separate bilge pumps, one forward and one aft.
I do have two red/white wires, they are red with a white strip spiraling around them. They go to the bilge pump indicator lights. If your wire in question is red with a white strip spiraling around it then that should be the wire supplying the power to the bilge pump indicator lights only, when the bilge pump comes on so does the indicator light through this red/white wire.
But you must physically trace the wires to be certain these wire colors apply to your craft as well.