My air horn on my VNL 780 is not working. The city horn works, but no response from the air horn when I push the center steering wheel. I would appreciate if someone would post a video of where the air horn is located under the truck and where the solenoid is located. I have been under the truck and have not located the horn. Either I am blind or the horn is missing.
Has any one replaced the OEM horn with a Grand General train horn? If so, where did you mount the train horn?