Alright so I recently installed an aftermarket radio (double din, subs and amp) in my 04' g35 coupe. I must have wired something wrong though because my tail lights aren't working properly now. They do not illuminate constantly like they are supposed to, instead they illuminate when I apply the brakes, rather than the brake lights. Turn signals and reverse lights still work. Can someone PLEASE help me as best as they can. I'd rather fix this issue myself if possible than having to take it somewhere and dish out my whole paycheck. I'd appreciate it! Thanks.
Aaron

I assume you did a search for the FSM wiring diagram for your vehicle prior to the install?
Double check your wiring.
Probably missing a ground for the taillights

Good luck

Telcoman