I bought my 2007 Ram July 5th. Around mid August my Serv 4WD Light came on while I was driving down the highway. I was only a mile from my destination, so when I stopped I re-started and light did not come back on. A week later came on 3 times in one day and it is not a Service Interval Light.
Took it to the Dealership and They had my truck for 3 days diagnosing the problem. According to the dealer the tech was working with an Engineer on my Serv 4WD indicator and other problems??? According to the dealer's service rep the engineer wanted to do exhaustive testing before he would say it was TIPM. The Service Mgr pretty much told me the first day that the tech was certain it would be the TIPM. Also, my Transfer Case Actuator does need replaced.
So next week I have to take my truck back because an Engineer/Inspector will be onsite and wants to look it over and go over the results. Oh and the parts are on back order.
Just happy it is covered under my extended warranty!!!