Douglas Dynamics 77755 Installation Instructions Manual - Page 14
Browse online or download pdf Installation Instructions Manual for Automobile Accessories Douglas Dynamics 77755. Douglas Dynamics 77755 17 pages. Snowplow
Print PageOPERATIONAL TEST AND FINAL ADJUSTMENTS
VEHICLE LIGHTING CHECK
1. Verify the operation of all vehicle front lighting
prior to connecting the snowplow harness.
2. Check the operation of the snowplow lights with
snowplow mounted to vehicle and all harnesses
connected.
Turn signals and parking lamps
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 flash at the same time.
Passenger‑side turn signal ON:
• Both vehicle and snowplow passenger‑side
turn signal lamps should flash at the same time.
Headlamps
Move the vehicle headlamp switch to the
"ON" position. Connecting and disconnecting the
snowplow lighting harness plug should switch the
lights between vehicle and snowplow as follows:
Snowplow lighting harness DISCONNECTED:
• Vehicle headlamps should be ON.
• Snowplow headlamps should be OFF.
Snowplow lighting harness CONNECTED:
• Snowplow headlamps should be ON.
• Vehicle headlamps should be OFF.
Dimmer switch should toggle headlamps between
high and low beams. The high beam indicator on
the dash should light when headlamps are placed
in high beam.
Daytime Running Lamps (DRLs)
An operational check of the vehicle and snowplow
DRLs will depend on the vehicle model, vehicle
DRL system, and type of Isolation Module
installed. Due to the variations in the OEM DRL
systems and the different Isolation Module
Lit. No. 52238, Rev. 05
options available, checking the functionality of the
snowplow DRLs will depend on the type of module
installed on the vehicle.
With the headlamp switch OFF, activate the
vehicle DRLs.
Snowplow lighting harness DISCONNECTED:
• Vehicle DRLs should be ON.
• Snowplow headlamps should be OFF.
Snowplow lighting harness CONNECTED and
vehicle in DRL mode:
• Check snowplow DRL function per the type of
Isolation Module installed.
Refer to the Mechanic's Guide for information on
the Isolation Module DRL functions.
Joystick or Hand‑Held Control
The snowplow plugs do need to be connected to
the vehicle harness connectors. The control power
indicator light should light whenever the control
ON/OFF switch and the ignition (key) switch are
both in the "ON" position.
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.
4. Check the aim of the vehicle headlamps with the
snowplow removed.
Plug covers shall be used whenever
snowplow is disconnected. Vehicle battery
cable is 12V unfused source.
5. 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.
14
CAUTION
July 15, 2020