2. Western
  3. In-Line Isolation Module Adapter Kit #28027-2

Western In-Line Isolation Module Adapter Kit #28027-2 Installation guide

  • Hello! I've reviewed the installation instructions for the Western 28027-2 In-Line Adapter. This adapter is crucial for vehicles with 4-headlamp systems, ensuring low beams don't activate when high beams are in use. The document also describes wiring connections and handling of the pre-installed relays. I'm ready to answer your questions about its installation and use.
  • What is the purpose of this adapter?
    Are the relays pre-installed?
    What should I do if the ring terminal wire does not reach the battery?
The company reserves the right under its product improvement policy to change construction or design details and furnish equipment when so
altered without reference to illustrations or specifications used. This equipment manufacturer or the vehicle manufacturer may require or
recommend optional equipment for snow removal. Do not exceed vehicle ratings with a snowplow. The company offers a limited warranty for
all snowplows and accessories. See separately printed page for this important information.
Lit. No. 29547, Rev. 00 Printed in U.S.A. February 1, 2007
A DIVISION OR SUBSIDIARY OF DOUGLAS DYNAMICS, L.L.C.
28027-2 In-Line Adapter Kit
Installation Instructions
1. Install the vehicle control harness and plug-in
harness(es) according to the Isolation Module
installation instructions.
2. Plug the 10-position female connector of the in-line
adapter into the Isolation Module as shown below.
3. Connect the 10-position female connector of the
vehicle lighting harness to the 10-position male
connector of the in-line adapter.
4. Connect ring terminal to NEGATIVE (–) battery
terminal.
NOTE: If ring terminal wire does not reach battery,
lengthen wire as required.
1234
Vehicle Control
Harness
Plug-In
Harnesses
Vehicle Lighting Harness
To NEGATIVE (–)
Battery Terminal
Vehicle Lighting Harness
In-Line AdapterIn-Line Adapter
Plug-In
Harness
To NEGATIVE (–)
Battery Terminal
GRN
YEL
YEL
ORN
GRN
GRN
ORN Right Low
Beam Relay
To NEGATIVE (–)
Battery Terminal
85
K1
30
86
87A
87
87
85
86
30
87A
BLK
K2
BLK
In-Line Adapter Relay Connections
Left Low
Beam Relay
CAUTION
This adapter is required for vehicles equipped
with a 4-headlamp lighting system that
illuminates the low and high beams when in
high-beam mode. This adapter prevents the
low beams on the snowplow from illuminating
when placed in high beam.
NOTE: The relays attached to the in-line adapter
come pre-installed. If they accidentally become
detached, reconnect them according to the relay
connection illustration.
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