Lit. No. 94430/94431, Rev. 07 25 January 15, 2014
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 (30 A) 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.
(old style ON/OFF control only.).
5. Turn the control 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 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 30 A in‑line fuse. Replace if
necessary.
3. Spreader motor is not running. 3. Replace motor if shaft will not turn.
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