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Q: None of the power windows don't worked on 2007 Pontiac Montana

rear side windows quit working some time ago, can't find any mention of a fuse or relay that operate them. Now both driver and passenger windows stopped working at the same time. Replaced fuse and relay as well as window switch on driver door with no change. Any advice?
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Maybe an open(read that as a broken wire) in the drivers door harness, like broken ground wire in flex section between door and body?
You have to check for 12 volts at relays ,fuses,check and back probe system with a test light.there's xa short in the wiring somewhere,
I would start at driver side switches..
Have battery voltage at the switch. Ground is good verified with multimeter but neither drivers or passenger windows operate.
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