S13 Multimeter Specs for Headlight Repair

[GymkhanaS13]

Ok, Can anyone give me some direction and/or advice on how I can test the headlight motors and wiring connecting the motors for a fault? Currently both my headlights open and only the passenger side will retract when they are turned off...So far this is what I have done: Replaced & Cleaned interior light switch, Checked & Replaced the 4 Relays, Replaced the Headlight Timer, Timing control unit and I also swapped my headlight assembly's with the motors from another car. At this point from my research I have tried everything that is mentioned here on the forums. That is why I am seeking some technical assistance to verify the wiring. I have used a multimeter before, but I am no expert for sure. If anyone could give me the specs to look for when I am testing, then I should be able to figure this out. Any other advice is greatly appreciated!! Thanks again everyone!!