Plug and Play. In my case it was "take the broken one off, remember where the ground wire was connected to, take the ground wire off, reattach the ground wire, put the new tail light on." Or in my case add 2 steps... Take the new light back off (because in a 3-minute time span I didn't remember where the ground wire was attached to and I put it in the wrong place), reattach the ground wire in the right place, attach the new light...again... You're done. Actually, you'd be done about 5 minutes faster because you remembered where the ground wire went.