I am installing some candle sticks, which are fancy marker lights for the outside of the truck. I want to splice into the marker lights/turn signal so they turn on when the parking lights are on and blink with the turn signal. the marker lights have 3 wires: Green, Black, and I think its purple with a white line. Which ones would I splice into to get my candle sticks to work the way I am looking for? Thanks for the time and help.