[76FJ55]

If you look inside the trunk located between the booster and the door hinge area you will find a round multi pin plug. coming from the door. this plug is for the mirror wiring, but this door side harness also attaches to the alarm switch. the alarm switch wires IIRC are the 2 wire connector next to the round mirror wire plug. if you unplug this connector and check for continuity o the door side, you should get the 2.35K ohm or close to it of the alarm switch. then while watching the meter move the door throughout its opening range and see if you get any fluctuation in the resistance readings. if they very based on door position you know you have a door harness issue, and depending on if they go up or down you may get a clue on what type failure is occurring. in addition if you do determine that it is the door harness, you can always leave this connector unplugged and bridge the car side with a 4.7K ohm resister this will tell the alarm system that the alarm is deactivated and should make the car operable until you do a final fix on the harness.

Edit: the 2 wire plug for the alarm switch should have a green wire and a brown wire.