My windows just started randomly not going up or down. Instead I hear a buzz from the glove box area when trying to raise or lower. I know of problems with the window lift ECUs but not buzzing. Anyone know what this sound might be?

 

A relay related to or part of the ECU, once you locate it by touch or sound, then it will be easier to think about what kind of ground, latte in the switch etc. is causing the relay to interrupt the supply voltage to the coil (which makes it a buzzer). Careful of this high dollar cardboard under the glove box. BTW, once all that is off it is easy to drop heater fan to clean out any leaves and junk. The common ground for the up/down switches must be somewhere near the console, could also be loose.

Here is pix of E303 the common switch ground