One problem related to ignition module has been reported for the 2007 Dodge Ram 1500. The most recently reported issues are listed below.
The truck wouldn't start. There was plenty of power from the battery for the lights, bells and horn but the truck wouldn't make a single sound. By pulling an ignition fuse to see if blown I accidentally reset a control module in the steering column. This worked for a while but eventually that trick no longer worked and I had to call the free roadside assistance I got by buying the truck.