How The 12-Volt Outlet Works The 12-volt outlet provides a convenient way for drivers to power electronic devices such as cell phones, tablets, and portable chargers while on the go. It works by using ...

The 12-volt system powers the starting circuit and the low-power computer systems that manage the high-voltage system. Pushing the start button activates a motor controller relay (or contactor, a ...

That would be clumsy and unnecessary. Now imagine mounting a small, 40-amp relay alongside the fan and connecting a short lead of 10-gauge wire to a nearby 12-volt positive terminal.