Hi All,
I've found a few threads about going from barn doors to tailgate and for how to use the old T5 tailgate loom to put in the T6 tailgate, but I haven't seen anyone discuss if you can simply use the T6 loom already fitted to the T6 tailgate to get it locking correctly and working.
My question is, please, can I use the new T6 tailgate with its original T6 loom and put that in my T5.1 to replace the old tailgate fully?
My new tailgate has a full loom up to the 17 pin plugs past the grommit to interior, the original door handle and switch and locks, number plate lights, wiper motor/washer and third brake light are all connected still so saves hassle with plug differences . Is the T6 tailgate loom connector block the same as the T5.1 where it connects just past the interior/grommit, or different?
Also, I realise I will also need two additional wires to the BCM and found this information from an older thread, hoping this is still correct if using a T6 loom? My only question on this part is, if its correct, do i still need an earth if i already had a tailgate previously on the current T5.1, wouldn't it have already had one , or no because it was not an electrical lock like the T6 and was mechanical (hence reason its now required)?
Taken from another thread-
"You need to add 2 wires to the tailgate connector from the BCM, one for the switches, and one for the lock.
Connections.
The tailgate has it's own harness with a 17pin connector joining it to the van.
1 - Lock - From Pin14 on the tailgate 17pin connector to Pin10 on the black plug of the BCM.
2 - Switch - From Pin13 on the tailgate 17pin connector to Pin23 on the black plug of the BCM. (If you want any additional switches to open the tailgate, just add another switch in parallel earthing Pin23 from the BCM)
3 - The tailgate needs an earth. Pin 15 needs connecting to the earth point down the D-Pillar near the rear light.
Coding
Now you need to tell the BCM that a tailgate is fitted and it needs to look for the switch signal.
Using VCDS, go to Module 9 Central Electrics and enable these.
Byte 01 Bit 5 Central Locking/Rear Lid: Contact controlled on detent
Byte 01 Bit 7 Central Locking/Rear Lid: Rear Lid Locking/Unlocking via Central Locking
Byte 07 Bit 5 Central Locking/Rear Lid: One-Motor-Lock installed
(This is from memory, hopefully someone can check it)
Testing
Hopefully at this point your tailgate is working correctly.
To test the lock, you can manually trigger it using VCDS.
VCDS monitors if the latch is fully engaged or not. Select Measuring Blocks Group 006:
Field 2, field 3 = "Open", "Open" = when rear lid fully open
Field 2, field 3 = "Closed", "Open" = when rear lid ajar (at first latch).
In the picture below the lid was obviously closed.
To check if the BCM is getting the signal to open the lock, the status shown in
Group 008, field 4 just indicates that the switch is pressed or not.
I've found a few threads about going from barn doors to tailgate and for how to use the old T5 tailgate loom to put in the T6 tailgate, but I haven't seen anyone discuss if you can simply use the T6 loom already fitted to the T6 tailgate to get it locking correctly and working.
My question is, please, can I use the new T6 tailgate with its original T6 loom and put that in my T5.1 to replace the old tailgate fully?
My new tailgate has a full loom up to the 17 pin plugs past the grommit to interior, the original door handle and switch and locks, number plate lights, wiper motor/washer and third brake light are all connected still so saves hassle with plug differences . Is the T6 tailgate loom connector block the same as the T5.1 where it connects just past the interior/grommit, or different?
Also, I realise I will also need two additional wires to the BCM and found this information from an older thread, hoping this is still correct if using a T6 loom? My only question on this part is, if its correct, do i still need an earth if i already had a tailgate previously on the current T5.1, wouldn't it have already had one , or no because it was not an electrical lock like the T6 and was mechanical (hence reason its now required)?
Taken from another thread-
"You need to add 2 wires to the tailgate connector from the BCM, one for the switches, and one for the lock.
Connections.
The tailgate has it's own harness with a 17pin connector joining it to the van.
1 - Lock - From Pin14 on the tailgate 17pin connector to Pin10 on the black plug of the BCM.
2 - Switch - From Pin13 on the tailgate 17pin connector to Pin23 on the black plug of the BCM. (If you want any additional switches to open the tailgate, just add another switch in parallel earthing Pin23 from the BCM)
3 - The tailgate needs an earth. Pin 15 needs connecting to the earth point down the D-Pillar near the rear light.
Coding
Now you need to tell the BCM that a tailgate is fitted and it needs to look for the switch signal.
Using VCDS, go to Module 9 Central Electrics and enable these.
Byte 01 Bit 5 Central Locking/Rear Lid: Contact controlled on detent
Byte 01 Bit 7 Central Locking/Rear Lid: Rear Lid Locking/Unlocking via Central Locking
Byte 07 Bit 5 Central Locking/Rear Lid: One-Motor-Lock installed
(This is from memory, hopefully someone can check it)
Testing
Hopefully at this point your tailgate is working correctly.
To test the lock, you can manually trigger it using VCDS.
VCDS monitors if the latch is fully engaged or not. Select Measuring Blocks Group 006:
Field 2, field 3 = "Open", "Open" = when rear lid fully open
Field 2, field 3 = "Closed", "Open" = when rear lid ajar (at first latch).
In the picture below the lid was obviously closed.
To check if the BCM is getting the signal to open the lock, the status shown in
Group 008, field 4 just indicates that the switch is pressed or not.
Last edited:
. I just need to decide on and purchase rear lights and I’ve everything I need. Tailgate is currently in Bodyshop’s getting a bit of work and an outer handle delete. I’ve got a kufatec harness with momentary switch to open from the inside. 
I am just about to do the same to my T5.1, I hope its ok to ask a few things 
