Please forgive me guys. I searched & read some of the threads,but have a couple of questions. I am wiring dumb. If I want to hook up my Back Up lights can I just tap into the reverse lighs wire going into the tail lights without a relay? I know I need a relay to put a switch if I want to be able to manually work them. If so which color wire is for the reverse lights? ANY help would be appreciated. THANKS!