One problem related to tail light switch has been reported for the 2007 Dodge Ram 1500. The most recently reported issues are listed below.
After replacing multiple bulbs for my passenger side headlight and changing the connector switch, I have been told I will have to replace my tipm (totally integrated power module) which is $800 + labor at the dealership. The tipm is the fuse box and I've seen several '06-'08 model Dodge owners on different forums with the same problem. When the tipm goes out, it can cause the headlights, locks, blinkers, tail lights, wipers interior lights, etc to not work. In 2006, Dodge replaced the fuse box with a tipm and since then it has been nothing but problems for Dodge owners.