Help with heated mirrors and blown 10 Amp fuse

[Tyrrell]

Hello hope someone might be able to help, the heated mirrors have never worked on my van and with the cold weather thought i would try to get them working. I've had a go at fixing it but now I'm a bit stuck with what to try. I've got a 2015 T5.1 it has heated mirrors but there not working on either side. With the vagcom its showing 00920 fault

I've removed both mirrors and neither are receiving any voltage, I did change both mirror glass/heat pads as they looked like they had seen a few heat cycles.
I have gone through the fuse box under the drinks holder and they where all fine except a mini 10 amp fuse in position 20 on the lower section. First through was to just change the fuse and try again. It blows straight away with the engine running. I presume there's a short but not 100% sure what that fuse relates to? from a bit of google work it seems to be (10A) Multifunction control module 1 (door mirror heater). Its the fuse circled in blue.

Any suggestions what to do next or how to chase the wire back? I've not yet managed to find a wiring diagram to see where it runs.

 

[mmi]

2015 T5.1

Volkswagen Transporter 2010-2015 Workshop Manuals + Wiring Diagrams | Free Download

Free View and Download Pdf Files for Volkswagen Transporter 2010-2015 Workshop Manuals + Wiring Diagrams | No registration, No payments.

cardiagn.com

 

[Tyrrell]

Thanks for the wiring diagram link, just looking through it now. when it has the number in a box what does that relate to? is that fuse position?
example below I've highlighted 8 with a box around it.

 

[Pauly]

It means the wire goes to line 8 which is the numbers along the bottom
If you look at the bottom of the page you have listed it’s 71 to 84 so you will need to go a few pages back to find 8

 

[mmi]

Thanks for the wiring diagram link, just looking through it now. when it has the number in a box what does that relate to? is that fuse position?
example below I've highlighted 8 with a box around it.

The wire "8" continues on "column" "8" on a different sheet - a couple of pages earlier - see the numbering at the bottom.
There you'll find corresponding "71" on the page.

There you'll find the supplying circuit - and the blowing fuse SC20.

 

[Tyrrell]

Ok thanks, that makes sense.