In all the states regulation says that the factory horn can produce between 100 and 110 decibel noise. The horns should be heard from at least 200 feet. But, some enthusiast truck drivers like to be heard from afar. Installing an air train horn is the best option. There comes the question of how to wire the train horn to the factory horn. You will need to find the appropriate place to secure the horn. Depending on the size it can be mounted on the truck's floor or in the engine compartment. M...
