PART 7: STARTING & OPERATING THE VEHICLE
Bobtail Brake Proportioning System
problem corrected before the vehicle is driven with
that trailer attached.
Wheel Spin Control Warning Lamp
Your truck/tractor ABS may have an acceleration slip reg-
ulation (ASR) or automatic traction control (ATC) feature.
This feature is controlled by a switch as shown in the next
illustration. Either of these features is monitored by a warn-
ing lamp located on the switch.
0008
The Wheel Spin Control warning lamp will brie
fl
y illuminate
and then go out when the ignition switch is
fi
rst turned on.
The Wheel Spin Control warning lamp will illuminate when-
ever the ASR or ATC system detects drive wheel spin. The
lamp will remain illuminated as long as wheel spin is de-
tected and the ASR or ATC system is applying the drive
wheel brakes or reducing engine torque. Do not allow the
Wheel Spin Control lamp to remain on continuously for
an extended length of time. Extended continuous use of
the ASR / ATC can cause overheating of the drive wheel
brakes. Engine torque or vehicle speed should be reduced
to eliminate wheel spin and prevent excessive application
of the ASR/ATC system. Except for checking for proper
illumination of the ABS and Wheel Spin Control warning
lamps when
fi
rst starting the vehicle, and for monitoring
these lamps while driving, no special operating procedures
are required. For detailed system description, see service
literature for your speci
fi
c ABS that was provided with your
vehicle.
Bobtail Brake Proportioning System
NOTE: The following information is applicable only
to tractor con
fi
gurations built on or after March 1,
1997 and not registered in the United States.
R(08/07)
Y53-6015
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Summary of Contents for Peterbilt 320
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Page 210: ...PART 11 SUBJECT INDEX Windshield Washer Reservoir 29 206 Y53 6015 R 08 07 ...
Page 212: ...Peterbilt Motors Company P O Box 90208 Denton Texas 76202 ...