VW Polo TDIl model 11/2004

[mrobo]

where and how to conect door locking ?
i found wires that come from left door there is one wire
blue/white with negative pulse i lock the door and with negative pusle trough
180 ohm resistor unlock the door but wen i conect it to my remote unit (negative impulses) can lock the door only and cant unlock the door, must i conect trough diode ?
can anybody help me please !
T h a n k s !