I have a 2006 HD F150 and the drivers side window switch works in the down position but is intermittent in the up position. Any thoughts and or repair options?

 

If you can , remove the window switch / panel and verify with a test lite or voltmeter that the switch is making good contact in the up position. If it is not, then the switch is in need of replacement. If on the other hand the switch is making good contact, then the problem is either in the wiring to the window motor or the motor itself. If you choose to do the test at the motor first , it is a bit more lengthy, but you will know in only one test.