Lit. No. 95362/95363, Rev. 07 21 January 1, 2020
TROUBLESHOOTING GUIDE
For control operation and use of diagnostic indicator lights, locate the section for your control style in the
Operating the Spreader section of this manual.
Problem Possible Cause Suggested Solution
No power to cab control.
(Ignition and control switches ON;
no illumination of indicator light(s).)
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 –
6A fuse; 3-pin – 10A) 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.
5. Control circuit breaker is tripped
(ON/OFF Control only).
5. Set the control to OFF. Reset the circuit
breaker and turn the control ON.
Speed control dial on the
Variable Speed (PWM) cab
control does not change motor
speed.
1. Malfunctioning cab control. 1. Replace cab control.
2. Red and white connectors are
incorrectly hooked up.
2. Reconnect so that red matches red and
white matches white.
Spreader does not operate.
(Indicator light(s) illuminated.)
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 30A in-line fuse. Replace if
necessary.
3. Spreader motor is not running. 3. Replace motor if shaft will not turn.
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