12 Volt Marine Battery Switch Wiring Diagram. INDEX OF POSTPIC 2012 07 1 8. Improvement Wiring and Repair John C.
Full Parts List BelowAmazon Electric Section. When wiring this switch you can choose if youd like to illuminate it because of the independent lamp attached to terminals 8 and 7. The batteries are wired like this.
The switch lets you drain one battery then switch to another to start the engine.
One battery has a red wire to and a black wire to -. The ability to shut off a battery in a boat can prevent dangerous attempts to start the motor in the event of a fuel leak in the engine compartment. Most single engine boats built in the last 40 years are equipped with two nearly identical and undersized marine batteries used interchangeably for starting or house loads. INDEX OF POSTPIC 2012 07 1 8.