1. yes, provided the N/C contact closes so it's not enough to change the status but important to be closed to live when released if you see what i mean
2. with ignition on you must get 12V against body at pin 10(orange/green wire) of ECU black plug(C0658) with pedal released and 0V with pedal depressed, use a needle from behind without unpluggin it, if you get those readings the brake switch is OK
View attachment 174656
Yep, that's what I get.