Motor And Motor Relay Test - Western HTS Mechanic's Manual

TROUBLESHOOTING GUIDE

MOTOR AND MOTOR RELAY TEST

WARNING
Keep 8' clear of the blade when
it is being raised, lowered, or
angled. Do not stand between
the vehicle and blade or
directly in front of the blade. If
the blade hits or drops on you,
you could be seriously injured.
Perform this test if the control lights
up and/or turns on, but the motor
does not run.
1. Check the motor relay fuse on
harness B. Replace if fuse is
blown, then retest snowplow.
2. Remove the coil fuse F1 in
harness B. Remove the 8" red
battery cable from the large
terminal of the motor relay and
isolate it. Removing the fuses
and isolating the battery cable
will eliminate the potential of
accidental blade movement
during testing.
Lit. No. 41467, Rev. 01
3. Check for 12V at the small
terminal of the motor relay with the
red wire attached to it. If 12V is not
present, recheck the coil fuse F2 in
harness B. If the fuse is good,
check the red wire in harness B.
Replace/repair either the wire or
the harness as needed.
Red
Black
S1
S2
Red Wire Daisy
Chain from "B"
Harness to
White from
S1, S2, S3
"B" Harness Blue from
"B" Harness
to S1
to S3
Green from
"B" Harness to S2
4. If 12V is present at the small
relay terminal with the red wire,
turn the control ON, then check
for switched ground on the small
terminal with the black wire
attached to it while activating any
function except lower. If switched
ground is not present, check the
8" Red Cable
Red Wire from
"B" Harness
Black Wire from
"B" Harness
Fuse
4A
S3
Blank
Connector
"B" Harness
"A" Harness
from Plow Cable
black wire in harness B of the
plow module. Replace/repair
either the wire or the harness as
needed.
5. Check for switched 12V at the
empty large motor relay terminal
while activating any control
function except LOWER. The
empty terminal is the terminal
that would normally contain the
8" red battery cable. If switched
12V is not present, replace the
motor relay.
6. If switched 12V is present at the
empty large motor relay terminal,
replace the motor.
7. Once repair/testing is completed,
reinstall fuses and 8" red battery
Plow
Module cable, then retest snowplow.
70
April 15, 2021