15. The switch wiring to actuate the lockers is a simple two-wire hookup. I mounted the switches on the side of the transmission's shifter for easy reach. I thought about mounting them in the overhead console but I would have had to run 8 more feet of wire, which wouldn't have been worth the hassle. Mel Wade at Off Road Evolution helped by letting me use his shop, and his technical advice greatly helped me complete this axle swap.