That is exactly what happened to me this weekend. My paperwork, on my Jeep, says 'factory tow package' and it has the factory 7-prong plug as well. However, I found out, that it's not wired to anything and CW says it is RARE
to find any factory tow pkg that is.
In my blonde opinion, that IS NOT a factory tow package! Cost me twice as much as I had been expecting.]
So, I feel your pain!