On our 2014, the power outlet is dead in the acc position. I installed an outlet direct from the battery to power the brake set up.
If you have the 4 cal with electric power steering, check it a few times to ensure that it tracks properly. Friends have theirs lock and slide the front wheels a couple of times. Dealer replaced a part under a recall and no problem since.
2006 Gulfstream Friendship G7, Cat C7 and Allison 6 spd
Honda VTX and Crusier Lift on the back
Blue Ox Aladdin, Brake Buddy, 2014 Chevy Equinox toad