Tom - your update adds more interest to this saga. So the Dorman works in 'some' Explorers but not all. I tried 'three' new Dorman units. In fact after the 2nd return to Advance, the tech went out with me to try the 3rd unit. We were certain it was my wiring. But after reading this post, I called my local Ford dealer. They had one in stock (I picked it up yesterday), and I plugged it in to the connector in the parking lot. It worked immediately. I can also tell you that the Dorman units for ATC and manual are similiar (as you eluded) but they are different and the manual one does not fit the same as the ATC. When I picked up the actuator from Ford, it looked identical to the Dorman unit in size and shape. The Ford part was only $48, so I really didn't pay too much more than Advance price. When you purchase the Ford one, the computer at Ford does mention that there were changes to the ATC programming, so it's possible the Dorman doesn't account for all programming (the Ford parts guys showed me the computer screen for the notes). So the bottom line is that it looks like it's hit or miss!