jodyh

I got a question for all the wiring people here. I have ghost lights that have been in my doors for 4 months now and wiring them has not went well. what i want to do is wire them inside the doors but apparently the switch that will power them is a negative positive? well didn't work when i did it. what i need to know is what wire color goes to what wire? By the way I have a 2001 mustang.