flip down screen

You will have to at least drop the headliner down so you can fit your hand 2/3 the way across. the flipdowns that i install are light enough for the molded headliner to support but if yours is heavy than you have to attach the mounting plate to something solid up there. heres how i do it: hold the unit up to the ceiling and stare at it for a while and figure out where it will be best suited. now look at the mounting holes on the unit and put masking tape on the headliner where the holes will be. hold the unit up there again (measure and measure again) and mark the holes (pen if it will fit or poke holes with a small punch) now drop the headliner down so you can get in there. drill the holes the size of the screws where you marked them(just the headliner and not the roof its not a cheap fix)put the mounting plate up in the headliner and hold the unit up to the holes. put the screws in and thats it to mount it.

do yourself a favor and bribe a buddy to help you cuz 4 hands is way better than 2 if youve never done this.

wiring is usally power  and ground