Originally posted by lt1s10
the ? is do you or don't you have a turn signal switch on the car? if you only got a 2 wire light socket and you wont tail lights, brake lights and turn signals you have to go through a turn signal switch which will cancel out the brake lights(which ever one you have on) when you are making a turn. if the car don't have a turn signals switch on it then you have to have a 3 wire light or add a light to both sides, if you have a turn signal switch then thats where the problem is.
Plus, coming out of the turn signal switch to the rear, you need a right and left wire to the brake light side of the bulb. You can't run one wire to both bulbs or your turn signal will never work.