Freightliner Air Horn
Service Campaign
The Freightliner chassis horn button on the steering wheel was supposed to control both the city horn and the air horns. The button would work for the city horn but not for the air horn. Freightliner had to change their programming to get the air horns to come on with the button. They both come on at the same time after programming is changed. We are anticipating a formal document from Freightliner to send to customers who are affected by this issue. This informal documentation was sent out to our customers on July 30, 2025.