First you would need to check if any of the motors have failed. If they had gone out one by one, the motor may be the fault but if all went out at once, it would most probably be an electrical fault and the most likely would be the master switch.
Activate the lock-out switch to see if there are any differences. Test each window separately.
September, 4, 2012 AT 4:22 PM
It's an electrical problem. When I open the door and pull the cord bundle a little it works.
September, 4, 2012 AT 4:31 PM
You have a break in the wires between the door and body pillar which can occur over time. The breakage is most likely to be internal and you might not see any external damage.
One way is to tug each wire with a little force to see which gives way.