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I have the very same problem, 1998 Expedition E.B.

Assuming you have the same vent motor and assembly as I do, I'll take a crack at this.

1. The switch should be receiving power, turn on your lights and check for illumination.

2. If it doesn't respond to lights, either the switch is bad or a fuse is blown.

3. If it responds intermittently, you can safely assume that the arm that extends has become dirty and requires cleaning.

4. Walk to the window that is open, lightly tap the metal mount on the outside of the vehicle. *Use an open hand and use one of two muscles at the base of your hand to do this. Do not force it, just bump it to loosen the debris in the extending arm.

5. If that works, close the window if you do not want to proceed further.

6. Using a penetrating spray -WD40 etc. Spray the exposed parts lightly to further loosen debris.

Operate the window a few more times and then leave it open.

7. Place a towel under the window and apply lubricating oil all of the arm hinges.

8. Operate the window again and depending on how far it extends, apply more lubricating oil.*Very little goes a long way.*

That's it, you're windows will be back to operational.

***However, there's always the chance that it is still very dirty and will need more invasive cleaning. There are small wire clips on the ball joint (the last lever before the window and those may be taken off for further cleaning. If that is needed, use white lithium grease or the spray that doesn't wash off. Spray or pack the hole where the ball goes and the replace ballpoint/arm together.

The End.

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12y ago
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