On my '94 F-250 the driver's side window will only go down about half the time. When it's down it will always go up though. I have tried swapping out the switch with a known good one to no avail. Sometimes it works and other times not. Any ideas.
Thanks in advance.

-Mike

 

Sounds like the wire from the switch to the motor possibly. Follow the wire from the switch back to the motor, then test the wire, or run a jumper wire from the switch to the motor in place of it...

 

check at the switch i had a friend that had that problem and it was the plug the wire was not pushed in all the way.
John

 

On my 92, the problem was inside the window motor. I took the motor off and took it apart - there was a loose rivet on a metal piece that went from one terminal where power comes into the motor to the motor windings - current had to flow through the rivet to the part it was riveted to. I restaked the rivet and soldered over it as well. Use a voltmeter or a lightbulb to see if power is getting to the motor before you pull it out of the door.
Dave

 

I've had a similar problem. Whenever I go through a car wash my 4x4 & Low Range indicators will occationally blink & then the driver side window will only go up. I have found that if I turn of the engine & restart it the problem will go away until the next time the 4x4 lights blink again. This'll go on for a few days & then quit until the next time I go through a car wash. I hear a relay type click under the dash when the indicator lights blink.

My solution - quit going through car washes & wash my truck the right way.

Hope this helps