VW Tiguan 2011 - assembly of the hook module harness 1K0 907 383

Hi

I installed a manual pull-out hook (line). I recently bought a used Westfalia 1K0 907 383 towbar module.
I have a bundle (supposedly the original one removed from such a car), instructions found on the Internet and dozens of "read" topics on forums. The problem is, I can't get to the end of the wiring harness.

My beam looks like this:





The wiring harness from the fuse box side is as follows:



As for the scheme, I am trying to adapt:



And almost all the wires are there, except for the 4, 5, and 6 in the photo. But it is black and green in the diagram and it is not in the bundle.
Could I please help me identify and connect these wires?


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Update:

I found a description like this:

B bundle, i.e. the one connected to the car (red 12-pin plug):
Pin 2 - blue and black 0.5 (cable color and thickness) - fuse box C (the one in the car on the driver's side) place 4, i.e. 12 V after ignition (I had to solder to the wire already there)
Pin 3 - black and red - 0.5 - BCM J519 plug C (beige, first on the right) pin 17 - stop light signal - soldered to the already existing cable
Pin 7 - orange-green 0.35 - BCM J519 plug C pin 15 - CAN - soldered to the already existing cable
Pin 8 - orange-brown 0.35 - BCM J519 plug C pin 16 - CAN - soldered to the already existing cable
Pin 9 - purple-red 2.5 - fuse box B (in the engine compartment) I, to make it easier, I connected to the free place of box C
Pin10 - brown 1.0 - ground point near the hook module mounting location
Pin11 - gray-yellow 1.5 - fuse box C position 25 - fixed 12 V
Pin12 - White / Red 1.5 - Fuse box C position 23 - fixed 12 V

https://www.vwgolfv.pl/viewtopic.php?f=53&t=3546&start=30

The other wires, connected to the little black 4-pin plug and relay, are probably lowering the hook from the button. I do not have it, so I will probably leave it unconnected.

I am not closing the topic yet, we will see how it goes tomorrow or the day after tomorrow (depending on how it will be with free time).

Module, harness mounted, connected as described above (more or less).

After activating the car controller, the indicator of the burned out bulb appeared on the board. The electromechanic who coded the module said he did not see it on the network, but had a bug that could indicate that the module has been connected for a while.
So the module has been activated, there is a light on the board, and I have a puzzle.

More precisely, I connected the harness like this:

PIN 2 - black and red wire 0.5 mm? - in the description there is place 4 - it was occupied for me, so I probably connected 6 to the black and white wire. Could it matter?
PIN 3 - wire from the brake light. I found it in the plug without any problems and soldered it.
PIN 7 and 8 - CAN wires - it's simple, I soldered it, even in exactly the same colors.
Pin 9 - violet-red 2.5 - I connected to 12 V always present (slot 52 in box C)
Pin 11 - gray-yellow 1.5 - fuse box C, place 25 - after 12 V ignition
Pin 12 - white and red 1.5 - fuse box C, place 23 - after 12 V ignition

Could it matter that 12V is after ignition or steady? Could it be more of a problem with the PIN2 cable? How to search

And if you connect the trailer, the error light goes out?

I checked with the trailer, nothing changes, the lights on the trailer do not shine.

I checked the voltage on the plug at the module, everything is as described. Maybe the module detects that the voltages are cut off with the ignition, but they should not, and is in error? But why then the diagnostician did not see it on the CAN network?
Is there any way to check if the CAN on the plug is OK?

I also read on the vwgolfv.pl forum, from which I took the description that my friend connected the ground to pin 1 and 10. I only have 10, because there was no wire to pin 1 in my bundle. Maybe this is a problem.

staki wrote:

can't see it on the web

It's more of a cause.

And are there any ways without specialized equipment to check if the CAN is reaching the plug? Need to have an oscilloscope?

Rather a matter of coding or the module itself. CAN is CAN, you connected to the original, after all, original module. It remains to encode the gateway so that the system can "see" it, provided that it is operational. http://wiki.ross-tech.com/wiki/index.php/Trailer_Hitch_Retrofitting_(5N) https://forums.ross-tech.com/showthread.php?10815-Tiguan-Trailer-Control-Module-coding- support-needed

The man who coded said they install these modules every now and then. Unfortunately, I have no way to check if he did it right.
I do not know what now, either I will look for a module to check (it can be hard), or I will give the car back, because there was an offer that they can bury and see what it may be wrong.
But unfortunately it will probably hurt in your pocket.

Thanks to Andrzej20001 for help and coding links.

I will also add that according to this information, if cut 12 V is given, where it should be constant, the module enters the service mode and may be invisible on the CAN. At least that's how I understand it, and understanding German translated by Germans into English can be a challenge :P

Text: https://www.westfalia-automotive.com/uk/workshop/terminal-15/

Unfortunately, I went on a business trip and I will check it quickly around Friday or Monday. I will connect all 3 thick wires to the uncut, according to the instructions from post 1.
I will let you know about any progress.

If it matters, the positive is on 9, 11 and 12 pins, after ignition on 2 (12-pin connector). The ground of pin 10 only.

Problem solved!
First, I connected all the +12 V indicated above to the uninterrupted circuit - unfortunately it did not help. Then I connected ground to PIN 1 and bingo! - the error is gone and the module is working :)

My module is labeled WESTFALIA 1K0 907 383 HW: 001 SW: 002
Thanks to everyone for your help.

I am just installing the hook at home, also original, in the bundle coming from the hook I still have a small 2-pin connector, what should it be connected to?