www.trinityhighway.com 26 Revision C December 2017
Remedy
1. Ensure power cables (+12vdc and ground) are securely
connected between the truck's charged batteries and the Control
Box.
2. To prevent premature damage to the motor, the Winch will not
operate if the initial voltage is not at least 12.0v (±3%) or 24.0v
(±3%) for 24 v systems. Check voltage to ground at winch if low
voltage is suspected. Vehicle should be running while operating
the TMA.
3. The unit will not lower when the truck is positioned on a steep
slope. Park the truck on a level surface and try again. If this does
not work, ensure the tilt sensor/switch (the cylindrical device
located in the control box on the right side wall) is parallel to
grade.
4. Ensure the Limit Switches are positioned correctly. Adjust as
required.
1. The Winch will not operate if the voltage drops below 10.3VDC
(±3%) for 12VDC systems or 20.6VDC (±3%) for 24VDC systems
at any time during operation. If voltage drops below the minimum
threshold, the Winch will not operate for 5 seconds. After 5
seconds the system will reset itself. While the truck is running,
use a DC voltmeter to ensure the voltage does not drop under the
minimum value during operation under load. Charge/replace
batteries as required and ensure the truck's alternator is charging
all batteries. Be sure all electrical connections are clean and free
of corrosion. If proper voltage cannot be reached, increase power
cable gauge or shorten the cable length between the battery and
TMA.
1. The winch solenoids are grounded through their mounting
brackets. If the bracket is poorly grounded (rare), contact
Customer Service.
2. See "Low Voltage" remedies above.
1. The winch is designed for intermittent use. Allow sufficient time
for the motor to cool down in between operations. Cool down
times vary depending on environmental conditions.
Probable Cause
1. Power cable not connected
2. Low Voltage
3. Truck is positioned on a steep downhill slope
4. Limit Switches not disengaging
1. Low voltage
1. Poor ground connection
2. Low voltage
1. Excessive Winch use
Problem
Winch will not operate
Winch operates
intermittently
Winch solenoids chattering
Winch motor running hot
Troubleshooting Table
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