Ok this is easy the drivers door lock actuator has 2 wires one yellow with a black stripe and one yellow with a green stripe. Take your door panel off and get the the actuator. Un plug your actuator connector, plug in your volt meter as shown (little hand drawn pick) across both yellow wires, wire harness side not the actuator it self. Turn you key on and have all doors shut. Cycle your door lock switch. You should see

Example
Door lock switch to lock position 12 volts
Door lock switch to un lock positing -12 volts
It could also be vis versa

If you are getting both 12 volts and - 12 volts your wires and Micu (multiplex control unit) aka door lock controller are fine. You just have a bad actuator.

If you do NOT get the 12 volts and -12 volts you have and open wire or a bad Micu.