View Full Version : bilge pump wiring.

07-14-2010, 03:25 PM
on a searay 29aj model 2001 with 5.0 mercruiser, need to identify the wiring colors for the regular and emergency pumps and how they connect to the wiring harness in the bilge. especially the emergency float switch. both floats wiring is disconnected from the harness.

07-15-2010, 09:38 AM
The pumps tie into the boat's harness, not the engine harness. Most mfgs don't adhere to a color standard for pump wiring.

Your pump mfg should have the installation sheets on there www site. The only thing sensitive on the pumps' wiring is their polarity; get it wrong and the pump spins backwards.

Traditionally, the float switch is installed on the positive side of the wiring. The details will be on the pumps' install instructions.

The best approach would be to contact searay and see if they will supply you the wiring diagram for your boat (if the pump were OEM equipment). The alternative would be to look at your switches, note the color wiring used and make your own diagram. Hopefully, the wires are continuous back to the pumps. Don't forget the fuses or circuit breakers.