Passenger rear Power window mystery

Bought a 2005 Prius three weeks ago and fixed a bunch of things, finally got to a non responsive passenger rear window. (Low priority). All the other power windows work (driver side perfect, other two a bit slow) the passenger rear has no motor sound at all so I assumed it’s a bad motor, purchases a motor and finally got to work on it today.

Right off the bat (after taking the door panel off) I noticed the power plug isn’t connected, low expectations but I plugged it in and then turned car power on and the window automatically rolled itself down to the lowest setting. (At this point I’m suspecting that’s why it was disconnected by the previous owner). I cannot roll it back up from that switch or the drivers master switch, I swapped the switch out with the front passenger and tried to isolate the issue, still won’t come up. So my natural conclusion is the motor is bad. I took everything out, cleaned the regulator brackets, swapped out to the good motor.

and viola! It rolled itself down to the lowest level again and I cannot roll it back up. I’m now suspecting the master rear passenger switch might be the issue?it is somehow telling that window to go down automatically? While I’m waiting for a replacement to arrive I’m hoping maybe you guys might have insights or know a fix that I don’t, thanks!

 

it was the master switch