Power windows intermittently don't work

2010 F-150 Extended Cab

Several days ago I got in the truck and none of the windows would work. All 4 windows were affected, and none of the switches would work -- driver's door multiple switch and individual door switches - nothing worked. Later in the day, they started working. Then again they wouldn't. This repeated randomly.

I identified the 30 Amp circuit breaker in the inside passenger side fuse panel and got a new one at the Ford dealer. The problem seemed to go away, but after a couple of days, it was back. None of the switches would work, none of the window motors would work.

Note: when nothing would work, I could get them working again by simply pulling the breaker out of the panel, checking continuity with a volt meter, and re-installing it. Windows would start working again, then they wouldn't.

On the F0rd F-150 Forums, I learned that the Delayed Accessory Relay was another possible culprit. I bought a new one at the Ford dealer and installed it. That worked for one day, and the problem came back. Out of ideas,. and eager to get the windows up before impending rain, I pulled the new circuit breaker and replaced it with the old one. The windows worked -- then they didn't.

I have no idea what to do now. Anybody have any ideas?

Thanks,

--Rob