The aren't hard to wire in, I did it on my old '96 F-150 It's just a inertial control module with a touch pad to be able to activate the trailer brakes independently of inertia. It's a pretty simple wiring job. The controller just activates the trailer brakes based on inertia...so you aren't cutting into the Truck harness, you just need power and run the connector to the rear for the trailer brakes. Intertial sensitivity is just a dial on the side of most of them.