Passanger side window wont work from any switch on my 406

Replace the regulator. It comes with the motor. You have to remove the door panel to access it.

I ran into a problem like that on a ford focus , the alternator was the problem . Test or have the charging system tested . Check for DTC'S - diagnostic trouble code's .

Check the wires on the driver's door between the door and the post. A break in a wire will affect the passenger side.

Passager window can be controlled by the driver's side also (usually). So that drivers switch interacts with the passenger switch then goes to the motor. It's like a 3 way circuit in a house.

make sure it is not a worn switch.

Check the window switch before you go and rip the doors apart.

its very common for the contacts in the window switch to go bad no more than it cost to fix just get one and yes its common for the regulator and motor to go bad your problems in the switch

If you can operate the other windows and lock at each door then basically it's only the drivers side that wont operate anything is that right? If so it's the switches in the drivers side door

This may be a problem with Ford Expedition in which a class action suit should help resolve. I also had a 2001 and a 1997 expedition which had the same problems. I traded the 1997 in for the 2001 and later bought a replacement arm operator for the rt passenger rear side. i did not get a chance to install due to a recent accident in which I totaled the vehicle--quick fix for me:)

mine is the same