I seem to have a headlight lifespan averaging of about 4-6 weeks on my 2011 Dodge Durango Crew. The last bulb (left, low beam) lasted 2 days, then went out within 12 hours of installing a new fog light (right). Tried replacing the wiring and receptacle, as there were signs of carbon in the connection, but that did not help. Dealership says they can't figure out why I have this recurring problem, and that they will have to replace the TIPM (not cheap) in order to continue their troubleshooting regimen, even though they have no reason to think that the TIPM has a problem. Does anyone have any experience with what might be causing these ongoing failures? Should undercarriage rinses at the carwash KO the system? Would conversion to LED bulbs help, our just get more expensive?