14
16992440 Rev A
Symptom/Diagnostic
Result
FIX
PUMP MOTOR NOT RUNNING WHEN UP, LEFT OR RIGHT PRESSED
Status light blinks ONCE
Continuity Problem
Check RED WIRE/MOTOR RELAY
Check voltage at MOTOR terminals with UP,
LEFT, or RIGHT buttons pressed
If voltage present - MOTOR is bad
Replace MOTOR
Check cable continuity between MOTOR RELAY
and MOTOR
If no continuity, check cable, connections,
and replace if necessary
Replace/repair cable or connections
Check control signal to MOTOR RELAY (small
wires to motor relay) with UP, LEFT, or RIGHT
buttons pressed
If voltage present and no click is heard
when buttons are pressed, MOTOR RELAY
is bad
Replace MOTOR RELAY
Check ground continuity between between
control ground at MOTOR RELAY and battery
ground
If no continuity, check cable, connections,
and replace if necessary
Replace/repair cable or connections
Plow won't move at all, moves "jerkily", very slowly, or chatters
Check fluid level in reservoir
Fluid should be visible in elbow fitting.
Add fluid
Air in fluid
Bleed air from system
Slightly loosen fittings to angle cylinders and
move the plow wings. Tighten fittings while
fluid
is escaping. Do this over an absorbent
mat, or hold a rag over fitting to absorb excess
fluid.
PLOW WON'T MOVE AT ALL, MOVES "JERKILY", VERY SLOWLY, OR CHATTERS
Check fluid level in reservoir
Fluid should be visible from fill cap -
reservoir should be ~3/4 full
Add fluid
Air in fluid
Bleed air from system
Slightly loosen fittings to angle cylinders and
angle the plow. Tighten fittings while fluid is
escaping. Do this over an absorbent mat, or
hold a rag over fitting to absorb excess fluid.
OIL IS LEAKING FROM CYLINDERS
Packing is loose
Tighten gland until leak stops
Rods are pitted
Polish rods with fine steel wool
OIL SPRAYS OUT OF VENT PORT IN POWER UNIT
Air in Fluid
Bleed air from system
Slightly loosen fittings to angle cylinders and
angle the plow. Tighten fittings while fluid is
escaping. Do this over an absorbent mat, or hold
a rag over fitting to absorb excess fluid.
Check fluid level
Fluid should be visible in elbow fitting.
Remove fluid if necessary - in most cases the
problem will subside as entrapped air dissipates.
PLOW WON'T DROP
Status light blinks 8 times
Continuity Problem
Check PURPLE WIRE/S1B COIL
Check voltage at S1B VALVE coil
If no voltage present, check cable and
connections
Replace/repair cable or connections
Check DROP SPEED control valve
DROP SPEED valve should be several turns
from fully closed
Open DROP SPEED valve
Check S1B VALVE for contamination
Poppet must move freely, and seat area
must be clear of any debris
Remove S1B VALVE and check free movement of
poppet, clean any chips/debris from poppet seat
PLOW WON'T DROP
Replace S1B VALVE
Check LIFT LOCK valve for contamination
Poppet must move freely, and seat area
must be clear of any debris
Remove LIFT LOCK valve and check free
movement of poppet, clean any chips/debris
from poppet seat
Replace LIFT LOCK valve
PLOW WON'T LIFT
Status light blinks 2 times
Continuity Problem
Check BLUE WIRE/S1A COIL
Check voltage at S1A VALVE coil
If no voltage present, check cable and
connections
Replace/repair cable or connections
TROUBLESHOOTING
Disconnect the RELAY MODULE CONNECTOR for the following steps.
The controller will not detect most electrical faults with the relay module connected.
