After taking a short hiatus, I'm back! (only to be asking for help lol)
So my LHS power window stopped working after a very "spirited" run a few days ago but it was working perfectly fine before that. Regulator was replaced when I bought the car back in 2011 and I think electric motors are quite hardy so it comes down to the wiring. Haven't checked fuses but RHS works fine so that should be ok.
Anyways funny story with this one. Back when it was working fine, I was driving down a downhill bend and during mid-corner, the LHS windows just suddenly rolls down automatically (dafaq/lol)...Mate says it's prob the ground wire, but I'm not sure how to check it?? Clueless when it comes to electricals
And now that it's stopped working, I've suddenly needed to use the LHS window more lately and this has become a PITA hah

Although it most often happens with the driver's door, the wires often break inside the flexible rubber boot between the door and doorpost. Problem may not be that, but keep it in mind.
Anyway, you will probably have to remove the trim and check the switch with a multitester, but you will need a circuit diagram for the wire color codes that you can Google up and download free.

Guess I gotta get off my ass and start learning how to read electric diagrams ergh lol. Been bz so I haven't had time to take a look at it but will soon!

Well before checking if the "window lock" was pressed or not, I had already taken off both door cards. And to my embarrassment/incompetence the window lock button was depressed. Once "unpressed" LHS window worked fine. Another facepalm moment...
However! It does not explain how my window rolled down during a corner. And (new problem) why my power mirror switch/master switch does not match up with the power mirror wire harness (attached pic)
 
Theory/suspicion: the power mirror harness was swapped with another model/car that is non GayDM since my master switch is GayDM style with retractable function

haha
haha
 
now turn the plug 90deg and it will be fine
So the wires come out the side closer to you as you look at the picture

wait are you serious about the plug being turned 90 deg?? Just put the door card together FML I'll do that next time lol

yep only need to remove the switches to do it

hmm but then the pins won't line up properly? Picture I attached has them all lined up male to female tho

There are two rows of pins at different heights in the picture I can see 4 pins that are not connected.
 
turn it 90 degs and watch everything work
 
 

that plug always catches people out