STEERING COLUMN-MOUNTED CONTROLS
3. Trailer Brake Hand Valve
This hand valve, mounted on the
steering wheel column, provides air
pressure to apply the trailer brakes
only. It operates independently of
the foot treadle valve. See Using the
Brake System on page 4-24, for more
instructions on proper use of the Trailer
Brake Hand Valve.
Horn
Electric Horn
Your Peterbilt has an electric horn.
To operate, press on the horn symbol
near the center of the steering wheel.
Air Operated Horn (Option)
Your Medium Duty may be equipped
with an air horn. To operate, pull on the
lanyard extending from the overhead
header panel.
3-46
Y53-6060-1C1
(03/17)
3
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