Air Buzzer disable

[SasquatchSanta]

Years ago, instead of a buzzer trucks had a devise called a wig wag. It's an air activated valve that's mounted over the drivers windshield and causes a small arm to swing down to alert the driver then air pressure starts to fall. They are still availeble.

http://www.stemco.com/Products/SpecializedProducts/tabid/83/Default.aspx

I bought mine on eBay --- I like it.