Troubleshooting
Problem
Possible Cause
Corrective Action
1. The power/ground cables or control
cables are not connected.
1. Connect the cables.
2. The pump motor has failed or the
pump has seized
2. Check for voltage at the pump motor
while the ignition switch is on and
the Raise button is pressed on the
controller. If voltage is present,
the motor brushes or pump/motor
assembly may be replaced.
3. The cable between the battery and the
solenoid is disconnected or broken.
3. Check for power to the solenoid by
testing for voltage between both large
terminals and ground. If voltage is not
present between one large terminal
and ground, connect or replace the
cable.
4. The solenoid has failed.
4. Check for voltage between the other
large terminal of the solenoid and
ground while jumping power to the
small terminal with the white/black
wire. If no voltage is present, replace
the solenoid. If voltage is present,
connect or replace the wire from
the small terminal of the solenoid to
ground.
The pump motor does not run.
5. Power from the relay is disconnected.
5. Test the voltage between the black
wire and ground at the white 9-pin
connector. If no voltage is present,
connect the relay. If voltage is present,
check the wiring and controller
switches.
1. The solenoid has failed in the closed
position.
1. Disconnect the controller and turn the
ignition on. If the pump continues to
run, quickly remove power to the pump
by disconnecting the power/ground
cables to the plow and replace the
solenoid.
2. There is a short between the black and
white/black wire in the controller.
2. Disconnect the controller and turn the
ignition on. If the pump stops running,
replace the wire.
The pump continues to run while the
switch is in neutral.
3. The switch has failed.
3. Replace the switch.
1. The power/ground cables or control
cables are not connected.
1. Connect the cables if they are not
connected.
2. The flow-control valve is closed.
2. Place the controller in neutral, then
open the flow-control valve.
3. The wiring on the valve block is not
connected.
3. Refer to the wiring schematic.
4. The solenoid valve or valve coil has
failed.
4. Check for voltage between the solenoid
valve terminal and ground while the
ignition switch is on and the controller
is in the Float position. If voltage is
present, replace the valve or valve coil.
The plow does not lower.
5. Power from the relays is disconnected.
5. Check the voltage between the black
wire and ground at the white 9-pin
connector. If no voltage is present,
connect the relays. If voltage is
present, check the wiring and switch
off the controller.
The plow lowers too fast.
1. The flow-control valve is open too
much.
1. Close the flow-control valve to the
desired drop speed.
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