Horn

[dtcerrato]

Our 4104 the steering wheel button is a loud 12V electric horn & the foot valve operates a louder air horn under the driver.

[luvrbus]

His steering wheel horn button should work the air horns on  his 4500 MCI they are little more high tech than older buses, some prefer the horn button on the floor and disconnect the steering wheel control 

[Brian R.]

In my 1960 MC-2,  I installed a bonafide 5 trumpet train horn (3 trumpets face forward, 2 face rear). It is an old tuned unit, hard to find anymore and many$$$. I put it in the spare tire compartment along with a dedicated extra air tank. Ran a cable system to the drivers seat to pull the valve.  Had it in there for several of years but took it out to give the space over to a minisplit AC. Still light it up at midnight every New Years to wake up any sleepy neighbors.

[chessie4905]

Some had a city/country selector switch to left side of driver. Some city and towns didn't  want air horns used, like schools and hospitals. Option on GMC's