Hi. I have a 2010 town and country the other day the speedometer stopped working and the blindspot monitor stopped as well. (related somehow). everything came back on later that day. drive the van out of town and it stopped again randomly. also found out that the cruise control doesn't work nor the sliding doors or rear tailgate work when it is malfunctioning. If i turn the car off and back on it usually will all come back. It may stay on or it might turn back off. There doesn't seem to be much rhyme or reason to why it is doing what it is doing. any help would be appreciated