Lit. No. B64093, Rev. 09
36
April 15, 2011
TROUBLESHOOTING
Problem
Cause
Solution
Pump will not run.
Snowplow harness may not be
properly connected to the vehicle
harness.
Verify that the harnesses are properly connected.
Power or ground cables to the
battery, pump or solenoid may not
be properly connected.
Properly connect all cables. Clean and lubricate with
dielectric grease. If power does not resume, check
the continuity of all cables to
fi
nd the break.
Pump will not run, power to the
solenoid.
The black ground wire and
brown/white activation wire on
the solenoid are not properly
connected.
Properly connect both cables. Test for power by
initiating any control function except the "FLOAT."
NOTE: The POWER rocker switch must be in
the
"ON"
position to properly test any snowplow
function.
If the solenoid is grounded and no power
exists, diagnose the snowplow and truck harnesses.
Pump will not run with power
to the solenoid. Brown/white
activation wire and ground are
properly connected.
The red, hot wire to the pump
motor is not properly connected.
Connect red wire and check the black ground wire.
If problem is not resolved, the solenoid could be
inoperable or the pump motor may be worn. Replace
the solenoid if there is no power to the pump.
Replace the pump motor if it is receiving power.
Pump will not turn OFF. Do not
allow the pump motor to run
continuously. Unplug the harness
until the solenoid can be tested or
a BLIZZARD
®
outlet can diagnose
the problem.
Solenoid may be damaged.
Disconnect the brown/white activation wire from the
solenoid. If the problem is not resolved, replace the
solenoid.
Short in the control or wire
harness.
Disconnect the control in the cab. If the pump turns
OFF, there is a short in the electrical system.
Pump runs but snowplow
functions are slow.
Fluid level in the pump reservoir is
low. Fluid is leaking.
Add
fl
uid 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. Increasing the pressure
excessively will increase the
amperage draw. This could
damage the vehicle harness.
Adjust the pressure. Remove the hex cap on top
of the pump and turn the screw clockwise. Proper
system pressure should be set at 2400 psi. Test
functions and repeat procedure as needed.
Amperage from the vehicle's
alternator is too low.
Repair or replace vehicle alternator. System
amperage draw is 145A at 1500 psi.
Pump
fi
lter may be clogged.
Remove the pump tank and thoroughly clean the
fi
lter.
A-frame latch will not move.
Draw latch is binding the A-frame
latch.
Lower the draw latch to relieve binding on the
A-frame latch and reposition the A-frame latch as
needed.
Snowplow 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 harness.
A-frame latch is in the (down)
locked position.
Lift the A-frame latch into the raised position.
Diode loop harness may be
corroded or could have failed.
Clean diode loop harness thoroughly and/or replace.
Coils on the manifold may be
damaged.
Remove the S6 coil from the cartridge valve.
Position a screwdriver inside of the coil and push
the draw latch connect/disconnect toggle switch
upward. The screwdriver should be magnetically
drawn to the coil. Replace the coil if there is no
action.
Snowplow will not lift with
magni
fi
cation to the S6 coil.
Hydraulic lock in the manifold.
This occurs if the voltage is too
low on the coils—should be
11.8 volts.
Loosen cartridge valve S6 to relieve pressure and
retighten. DO NOT OVERTIGHTEN! Valves should
be torqued to a maximum of 24 ft-lb.
Solenoid cartridge valve may be
contaminated.
Remove any foreign objects that may be obstructing
proper valve operation. Replace if not operating
properly after cleaning.
