Out of the blue, both rear electric vent windows ceased to work. Fuses are all ok. You can wiggle the switch till next week and nothing happens. Any clues?

 

May be a faulty switch.

 

i had the same issue with both rear power quarter windows not working.fuse checked out ok.what i found was a coroded yellow wire splice under the passenger plastic trim piece at the passenger front door.i lift the plastic trim off and lifted the carpet out of the way .i pulled up the wiring harness and removed the factory tape wrapping.i found the yellow wire which powers up the rear power windows corroded green.i gave the wire a pull and it pulled apart.i then cut and stripped the wires and added a new piece of wire.everything works like new.hope this helps.