Wiring Harness may Overheat Causing Fire – 7-Way Wiring Aug 31, 2018Summary American Technology Components, Inc. (ATC) is recalling certain 7-Way Wiring Harnesses used for the aftermarket installation of truck caps. The harnesses being recalled are Leer model numbers 201055, 138359, 202060 and 142672, and Tag model numbers 201056, 140259, 202061 and 142673. The wiring may overheat. How to Wire a Leer Truck Cap | It Still Runs Run the red wire from the shell through the bed and to the brake wire in the wiring harness. Place the blue scotchlok connector on the brake wire and the red wire, then clamp it down with a pair of pliers. Find a black wire in the wiring harness and repeat the process in Step 3 with the black wire from the shell.