The ABS is designed to communicate with a trailer
ABS, if they are compatible. Compatibility will result
in the illumination of the trailer ABS lamp during ve-
hicle start-up and fault detection. The trailer ABS
lamp will not illuminate unless a compatible trailer is
connected to the tractor.
Vehicles with ABS may have Automatic Traction Con-
trol (ATC). On these vehicles, the ATC system auto-
matically limits wheel spin during reduced-traction
situations. In normal braking applications, the stan-
dard air brake system is in effect.
Pressing the ATC SPIN switch (
Fig. 4.21) shuts ATC
off and allows drive wheel spin. Pressing the switch
again, or cycling the ignition key, will cycle the sys-
tem back to normal operation.
NOTICE
The ATC spin feature is intended to be used
under specific slippery conditions that require
momentary increased wheel spin. Using this op-
tion for an extended period of time may damage
the vehicle brake system.
Windshield Wiper and Washer
Controls
NOTICE
Do not attempt to manually move the windshield
wiper arms. Wiper motor damage will occur if the
arms are forcibly moved.
The windshield wipers and washer controls are on
the multi-function turn signal lever on the left-hand
side of the steering column. See
Fig. 4.22.
Wiper Controls
The wipers are operated by a rotary switch on the
turn signal lever. There are five settings: off, two in-
termittent settings, and two continuous speeds. Sym-
bols mark each setting on the dial.
Turn the wipers on by rotating the rotary switch up.
Rotate the switch further to increase the speed of the
wipers through the two intermittent settings, then to
continuous low and high speeds. Rotate the switch
down to slow the wipers down. Rotate the switch as
far down as it will go to turn the wipers off.
The default speeds for the two intermittent settings
are 6 seconds and 1 second.
f61059102/03/2017
Fig. 4.20, Trailer Brake Lever
f611333
03/02/2016
ATC
SPIN
Fig. 4.21, ATC SPIN Switch
f61126402/17/2017
1
3
2
4
1. Headlight Control
Symbols
2. Windshield Wiper
Switch
3. Windshield Washer
Switch
4. Turn Signal Symbol
Fig. 4.22, Windshield Wiper/Washer Controls
Driver Controls
4.11
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