August 10, 2005 20 Lit. No. 13648/9511, Rev. 07
TROUBLESHOOTING GUIDE
PROBLEM POSSIBLE CAUSE SUGGESTED SOLUTION
1. Control connector plug is loose. 1. Check plug connection at cab
control.
2. Battery lead in-line fuse is blown. 2. Change the fuse (4 pin harness-
6 amp fuse; 3 pin-10 amp) and
inspect for short circuits.
Check power supply for 12V DC.
3. Battery connection is poor. 3a. Check for low battery.
3b. Clean or replace ring terminal.
Coat with dielectric grease.
4. Battery wiring harness is
damaged.
4. Repair or replace damaged wires
or harness as required.
No power to cab control
(Ignition and control switches ON;
no illumination of indicator light(s).)
5. Control circuit breaker is tripped
(ON/OFF Control only).
5. Set the control to the OFF
position. Reset the circuit breaker
and set the control to the ON
position.
Speed control dial on the Variable
Speed (PWM) cab control does
not change motor speed.
1. Malfunctioning cab control.
2. Red and white connectors are
incorrectly hooked up.
1. Replace cab control.
2. Reconnect so red matches red
and white matches white.
1. Overloaded condition is causing
over-current protection to activate
(Variable Speed Control only).
1. Reset cab control by turning the
power OFF. Depress the
START/BLAST switch to resume
operation.
2. Wire harness is damaged or has
an open circuit between cab
control and spreader.
2a. Check plug connections at cab
control and spreader.
2b. Check wire connections at
spreader motor and at vehicle
battery – disconnect motor
leads, turn control on, set cab
control to maximum on variable
speed controls and check for
voltage at motor leads.
2c. Repair or replace damaged
wires and connectors
2d. Check the 30 Amp in-line fuse.
Replace if necessary.
3. Spreader motor is not running. 3a. Replace motor if shaft will not
turn.
Spreader does not operate.
(Indicator light(s) illuminated.)
3b. Remove and inspect both motor
brushes. Replace if worn (Brush
kit 65241).
Unplug the spreader harness
and tag out, if required, before
performing any of the following
repairs.
1. Obstruction is preventing rotation. 1. Clear obstruction.
2. Drive belt is loose or damaged. 2. Adjust tension or replace belt if
worn or damaged.
3. Motor pulley not secured to
motor shaft.
3. Tighten pulley set screw or
replace pulley if damaged.
4. Spinner pulley is not secured to
spinner shaft.
4. Replace cap screw and nut if
missing or damaged. Replace
pulley if damaged.
Spinner does not turn.
(Motor is running.)
5. Spinner shaft bearings are dry or
seized.
5. Grease or replace bearings.
For control operation and use of diagnostic indicator lights, locate the section for your control style in the Operating
Section of this manual.
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