The auxiliary switches, AUX1 through AUX6,make aftermarket customization easier. Six prewired switches connected to the power distribution box of your Bronco allow you to control light bars, pod lights, or an in-Bronco refrigerator. The new Bronco has pre-run wiring in those hard-to-reach places that reduces the amount of tear down required when installing accessories. All you have to do is connect the right circuits together. Furthermore, the places that you’re connecting wires are in easy to reach locations. Newer vehicles, including Bronco, make it difficult to tie into the wiring harness but this feature allows DIY builders to customize their Broncos without warning lights and error codes flashing at them for their efforts.

Auxiliaryswitches are standard on Wildtrak, First Edition, Badlands, and Black Diamond
Broncos and an option on Base, Big Bend, and Outer Banks. If your Bronco is
equipped with them, they’ll be located above the rear-view mirror.

Well,once they’re wired up, you just flip the switch in order to power the accessory
that you’ve assigned to that switch. When engaged, the switches will
illuminate. The power will be coming from the battery so it’s best to have the
engine running when using accessories so that you don’t come back to a dead
battery.