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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 ...
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 ...
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.