Using these cab lights is easy. First, gather all the parts in the kit, which includes the 5 cab lights, hardware, and wiring harness. Make sure your truck doesn't have OEM cab/clearance lights. If it does, you'll need to get the right lenses and bulbs for replacement. Drill 2 small screw holes and a 1/4″ round hole for the wire on your truck. Then, attach the cab lights using the hardware provided. Connect the wiring harness properly. When on the road, these lights will alert other drivers to your truck's size. To maintain them, clean the smoked lenses regularly with a soft cloth. Check the wiring connections every few months to make sure they're secure. If you notice any issues with the LEDs, replace them as soon as possible.