Golf Mk5 - Indicator on mirror not working

[nia573]

2006 Mk5 Golf Plus
The indicator unit on the drivers side mirror stopped working last week. All other indicators work fine
Initial thought was that the unit itself had failed, so I ordered a replacement from ebay, & fitted it today - trouble is the indicator still doesnt work

Ive bench tested the new & old indicator units & they both work fine so its a wiring problem I think

I have a black/blue wire & a red/blue wire at the indicator connector. Tested these & I have earth at one but no 12v when the indicators are on (couldnt remember which colour gave earth)

I then removed the rubber bellows at the A pillar that connects the door wiring to the car itself, just to check for any broken wires
All I saw was a slight knick in the insulation of a red/black wire. This gave 6v if I remember correctly

I was hoping to see black/blue or red/blue wires at the a pillar connector but couldnt. Anyone know what the indicator wire colour is at the a pillar connector into the door please

I havent a wiring diagram so could someone give me some guidance please - Ive got a MOT next month & think it will fail if its not working

[Bradsinclair5]

Did you get this sorted?