ZeroBanger

My passenger side door lock doesnt work. It used to work, then one day it stopped. Then it would work again. Its been a good 6 months, hasn't worked in a while. My passenger window used to be like that, and I had that harness cleaned up which fixed it.

So my question is, does anyone know what color wire is the power going from the drivers side to the door lock on the passenger side? Im not sure where the problem is, I guess doing some electrical test would point me in the right direction. Thanks