Door not working, Need help tracing a wire

[ChrisSalter]

Hi All,

So some time ago my rear left door stopped locking/unlocking and just appeared dead.
I've finally gotten around to looking at the issue and started by testing the components of the door

So i've tested:
1. Actuator
2. Module
3. internal door loom
(All were tested by removal and connection to the other side door)

All appeared fine but i did find 1 anomaly in the door pillar plug

There is a violet/grey (photo attached) wire in the plug and it has a voltage varying from 3-10v, on the other 3 doors this same colored wire has no measurable voltage at all so i'm thinking this could be a step in the right direction

The question i have is, does anybody have any diagrams that show where this wire goes? What it is? and where i can find the other end of it?

Once i know where it goes i can do some continuity/short tests and try to identify why this particular door has a voltage that the others don't

Please help....

 

[Stonefish]

J388 Rear Passenger control module pin 10/T20h ----> pin 6/T27d (ringed in your picture, B-pillar) ----> pin6/T27c (A-pillar) ----> pin 10/T20g J387 Front Passenger control module.
T27 is a 27 pin connector. T20 is a 20 pin.

 

[ChrisSalter]

J388 Rear Passenger control module pin 10/T20h ----> pin 6/T27d (ringed in your picture, B-pillar) ----> pin6/T27c (A-pillar) ----> pin 10/T20g J387 Front Passenger control module.
T27 is a 27 pin connector. T20 is a 20 pin.

You are a god! Thankyou

 

[ChrisSalter]

J388 Rear Passenger control module pin 10/T20h ----> pin 6/T27d (ringed in your picture, B-pillar) ----> pin6/T27c (A-pillar) ----> pin 10/T20g J387 Front Passenger control module.
T27 is a 27 pin connector. T20 is a 20 pin.

I’d just like to say a HUGE thankyou, this comment led me directly to a resolution and the door is now working and fully operational again

For any that are interested, i’ve uploaded an image of the offending wire, it’s the violet/grey wire in the left of the image, it must have been nicked in what looks like a historic repair, had corroded and broken