i'm assisting my friend in redoing his radio setup...everyone worked ok b4 we started...i ripped all the wiring apart then started fresh...his car is a caddy deville...i'm having problems installing his clarion vrx815 deck...cd plays...radio plays...but screen play is not...while messing with the deck...we realize these deck has a safety mode to it...there's a wiring that needed to be tapped into the parking break...after reading the manual...it vaguely stated that that wire needed a ground...so thas wat we fed it...every time we play a movie the screen is so dark u can hardly see the movie...we knoe the video feed is good cuz we tried it on another tv...am i missing something???

 

plz help if anyone knoes...