Well, I know it's typically bad form to necropost, but I was searching for threads relative to my issue and found this old post by my wife! (hello dear!)
To answer your question, dhh3; yes we have remote start, but the issue has progressed well beyond the horn blowing issue. Approximately a year ago, the horn relay issue got so bad that the battery was being totally drained if the car was not being driven daily. After replacing the battery once , I purchased a trickle charger to hook it up to if I had a couple days off and no plans for distance driving. Several months ago I began noticing random dash lights being on while the car was parked, most often the digital ram symbol but others as well. Then I saw one of the taillights would be on while parked, for several days in a row. At this point I haven't driven the car in several months and really need to figure out the best/most inexpensive way to repair this. Preferably myself.
Searches for after market tipm replacements have not been successful and I'm weary of purchasing one from a salvage yard. Are refurbished units available, and if so where?
