Problem
Probable Cause(s)
Suggested Remedy
Pump will not run.
Plow wire harness and vehicle wire harness may not be
Verify the wire harness is properly connected. Review
properly connected.
the instruction on pages 8-11.
Ground cables to the battery, manifold or solenoid may
Properly connect all cables. Clean and lubricate with
not be properly connected.
white lithium grease.
Pump will not run, no power to the solenoid.
The red, power wire and brown/white, activation wire on
Properly connect both cables. Test for power by
the solenoid are not properly connected.
initiating any rocker switch function except the float.
Note: The POWER rocker switch must be in the “ON”
position to properly test any plow function. No power,
diagnose plow & truck wire harness.
Pump will not run with power to the solenoid.
The red, hot wire to the pump motor is not properly
Connect red wire. If problem is not resolved, the
connected.
solenoid could be seized or the pump motor may be
worn. Replace solenoid.
Pump will not turn off.
Pump solenoid may be damaged.
Disconnect the brown activation wire from the solenoid.
If the problem is not resolved, replace the solenoid.
Diode pack may be corroded.
Clean diode pack thoroughly and/or replace.
Short in the control box or wire harness.
Disconnect the control box in the cab. If the solenoid
turns off, there is a short in the electrical system.
Pump runs but plow functions are slow.
Fluid level in the pump reservoir is low. Fluid is leaking.
Add fluid to within 3/4” from the top of the tank. Check
for leaks around the pump, manifold and cylinders.
System pressure may be set too low.
Adjust the pressure. Remove the hex cap on top of the
pump and turn the screw clockwise 1/8 turn. Proper
system pressure should be set at 1800 PSI. Test
functions and repeat procedure as needed.
Voltage from the vehicle’s alternator is too low.
Repair or replace vehicle alternator. Voltage must be no
less than 11.8 volts.
Pump filter may be clogged.
Remove the pump tank and thoroughly clean the filter.
A-frame latch will not move.
Draw latch is binding the A-frame latch.
Lift the draw latch to relieve binding on the A-frame
latch and reposition the A-frame latch as needed.
Plow will not lift. Pump works properly.
Control station in the cab may not be properly connected.
Connect the power connector from the control to the
vehicle wire harness.
A-frame latch is in the (down) locked position.
Lift the A-frame latch into the raised position.
Solenoid may be damaged.
Remove both S6 & S7 solenoids from the cartridge
valves. Position a screwdriver inside of the solenoid and
push the draw latch connect/disconnect toggle switch
upward. The solenoid should be magnetically drawn to
the screwdriver. Replace solenoid if there is no action.
54
Troubleshooting Guide (1 of 2)
Troubleshooting Guide
Prior to diagnosing your Power Plow, verify that all connectors (plow and vehicle wire harness plugs, headlight adapters,
control box, fused hot lead, draw latch switch, solenoid ground wire harness, coil wire lead harness, plow headlight
harnesses) are free of corrosion and are well lubricated with white lithium grease. Insuring that all connectors are in good
working order will save time in determining your snowplow’s service needs.
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