I initially was thinking it was the control head....assuming these are the controls in the dash. I have a used one I bought from a yard on ebay. Is there a certain thing to do when you plug that in? When I plugged it in before that light for the ac flashed and it didn't work either. I believe it is out of the Dakota and it is silver in color but it seems the same. Part number is the same except for the last couple letter which I assume indicates the silver face plate. (Looks like I can take it off...appears to just me siliconed on.)
Any how the other controlhead didn't seems to work...unless it needs to have the computer recognize it or something.