I am working on the exact same problem currently on my '05 and The Critic is sending me some diagnostic info that I will share if it is relevant.
Allpar is a good site to check for Mopar stuff, but you need to join to get full access (I think)to the forums.
You might want to check the condition of the wire and plug that goes into it.
"There are things you do that put food on the table, and there are things you do that feed your soul." I am blessed to have them be the same things.