I also tried to do this... yesterday as a matter of fact. I tried to simply wire tap into the existing led module for the ambient lights in the door pockets and could not...no matter what I tried... get the new LED to light up. Someone mentioned to me that it may not be supplying that little bulb with 12 volts of power, which is what my LED's required. This was very frustrating after taking the door panel off, which, IMHO is very scary.
