I'm gonna be reviving this thread for sake of not making duplicates and maybe someone has an idea. I checked ETKA for part numbers, and not only that, I have also bought at least 6 used switches, with the 1L0959855 P/N which is listed in ETKA catalog, I also cross referenced them with other switches that do work, and indeed, all other than the master switch carry 1L0959855, which master carries 191959855. I'm sure some of the switches were defective, as they did not receive 12V, nor did they operate the power window, meaning they weren't sending signals, some did light up, but would seem to get hot as if they were internally shorting.
I tried known working switch from passenger side window, and while it lights up, it doesn't actually do anything. With the old switch in place, it has power, but of course, it doesn't work.
I can't seem to figure this one out myself, so the car will be going to an auto electrician next week, but if anyone has any idea for me to try that I haven't tried, I'm all ears. Thanks everyone. Car is same as in the thread, except this is a '98, 1L2 Toledo TDi sport