1987 Buick Regal passenger window not working on both switches only driver side goes down?

I have a 1987 Buick Regal and my passenger window stopped working. I have bought new switches to see if it was the problem but it wasn't, Only the driver's side goes down from the master switch and the switch on the master for the passenger doesn't work either what else can I can do?1987 Buick Regal passenger window not working on both switches only driver side goes down?Check the wires where they pass through from the body to the door. Look for wire insulation breaking, or conductor breaking inside the insulation. Otherwise, it could be the p/window motors.