The other day, I was driving down the road when all of a sudden, my horn started to honk constantly. It startled the crap out of me to say the least. I didn't have the transmitter to turn it off. This happened after I had a Viper 791 remote start alarm installed. The alarm installer told me that he couldn't disable the factory security system. Sometimes the factory alarm has fits with the Viper. Has this happened to anyone else?