System Overview; Vehicle Lighting Check - Western HTS Mechanic's Manual

SYSTEM OVERVIEW

VEHICLE LIGHTING CHECK

1. Check the operation of vehicle
lights and then snowplow
lights with snowplow attached
to vehicle and all harnesses
connected.
Turn signals and parking lamps
Move vehicle headlamp switch to
the parking lamp "ON" position.
Parking lamps ON:
• Both vehicle and snowplow
parking lamps should be ON at
the same time.
Driver-side turn signal ON:
• Both vehicle and snowplow
driver-side turn signal lamps
should fl ash at the same time.
Passenger-side turn signal ON:
• Both vehicle and snowplow
passenger-side turn signal
lamps should fl ash at the same
time.
Lit. No. 41467, Rev. 01
Headlamps
Move vehicle headlamp switch
to the ON position. Connecting
and disconnecting the headlamp
harness plug should switch
between vehicle and snowplow
headlamps as follows:
Headlamp harness plug
DISCONNECTED:
• Vehicle headlamps/parking
lamps should be ON.
• Snowplow headlamps/parking
lamps should be OFF.
Headlamp harness plug
CONNECTED:
• Snowplow headlamps/parking
lamps should be ON.
• Vehicle headlamps should be
OFF.
Dimmer switch should dim
whichever headlamps are
operating. The high beam
indicator on the dash should light
when either set of headlamps is
on high beam.
Daytime Running Lamps (DRLs)
For PN 29070-1:
• On vehicles equipped with DRLs
integrated into the vehicle
headlamps. Activation of the
switched accessory wire (a
key-controlled power source)
port C, position C, applies
battery voltage to the module's
high and low beam relay coils,
which causes the relay contacts
to shift from the "vehicle" to
the "snowplow" position. This
module will transfer the
vehicle headlamp DRLs to the
snowplow (turns off vehicle
DRLs).
• On vehicles equipped with
dedicated DRL bulbs or
vehicles using the turn signals
as DRLs, this module will not
turn OFF the vehicle bulbs.
While the vehicle is in the
DRL mode, this module will
illuminate the snowplow light
turn signal fi laments.
Joystick Control or
CabCommand Hand-Held
Control
The control indicator light should
light whenever the control
ON/OFF switch and the ignition
(key) switches are both in the
ON position. The snowplow
plugs do need to be connected to
the vehicle harness connectors.
2. Check aim of vehicle headlamps
with snowplow removed.
3. Connect all snowplow and
vehicle harnesses. Raise the
snowplow and aim snowplow
headlamps according to the
Snowplow Headlamp Beam
Aiming instructions included with
the headlamps and any state or
local regulations.
CAUTION
On 2-plug electrical systems,
plug covers shall be used
whenever snowplow is
disconnected. Vehicle battery
cable is 12V unfused source.
4. When the snowplow is removed
from the vehicle, install plug
covers on the vehicle battery
cable and lighting harness. Insert
the snowplow battery cable and
lighting harness into the cable
boot on the snowplow.
April 15, 2021
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