STEERING COLUMN-MOUNTED CONTROLS PART 4: CONTROLS AND DISPLAYS
– 40 – Y53-6032 (R05/10)
Electric Horn
Your Peterbilt has an electric horn. To sound the horn,
press on the bar in the center of the steering wheel
Electric Horn Bar
Air Horn
Your vehicle has an air horn in addition to an electric horn.
Control the air horn by pulling on the lanyard extending
from the overhead header panel.
Trailer Brake Hand Valve
This hand valve provides air pressure to apply the trailer
brakes only. It operates independently of the foot treadle
valve.
NOTE: The trailer brake is not to be used as the
main means of braking. To use this brake fre-
quently instead of using the foot brake will wear
out the trailer brake sooner.
To operate the trailer brake hand valve: pull down on
the lever under the right side of the steering wheel.
02975A
Y53-6032.book Page 40 Monday, May 24, 2010 3:37 PM
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