Only thing done to the car is aftermarket head unit, but it is a touchscreen dvd player and all. Everything online wants me to wire a certain wire to the parking brake but i haven't bothered to do that, so the dvds wont play. But I don't know if the lights were an issue before I installed that or not. I've checked one of the bulbs its fine, but I get no reaction when the car is put in reverse. It is a 6sp MT but I can't find any fuses or anything wrong. I also checked the reverse switch on the trans. Any ideas?