I tried to install the Door Mirror Auto System. Fail. Can't get it to work. Might need an auto electrician or the module itself is stuffed.
It's the same part number for all VA (H2717VA000) platform cars, there is a similar part for the BRZ/86 (H2717CA000) that has more forum threads. You have to tap the Yellow wire to the loom for the lock. I assume to detect a pulse when locked. I've emailed JapanParts for a wiring diagram as I saw they had sent one to an 86 owner. I can't find a DIY thread for this on any Aussie forums. It's usually about some cheaper Chinese equivalent or 'done, that was easy' with no explanation.

On the plus side I have fixed the bass rattle in that door with genuine trim foam. So not a complete waste of 4 hours.