So I want to run backup lights on my TJ. But the thing is I don't want to just splice them into the stock reverse lights. I want them on probably the tail lights with a switch inside the switch panel by the stick shift. So my question is can I splice into the taillights and run a switch without running it through a relay or should I just buy a relay with the wire and switch? I'm thinking about those round black Napa Auto Parts lights that are only like ten bucks a piece.