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Date of Origin – 02/24/11
Updated – 02/03/20
THUNDER TARP TROUBLESHOOTING GUIDE
Remote function not working.
1. Reset system by removing power trailer power connection for 15 seconds then reconnect.
2. Turn on the tarp system by pressing the (Open) & (Close) buttons simultaneously on the keypad for
3-5 seconds until the LED and buttons illuminate.
3. Test remote function.
4. If no function, reset system and reprogram remote per the remote programming instructions.
5. Also can be an indication that the trailer power connection is loose and needs reworked and tightened.
Tarp system will not power on.
1. Make sure that the 2-pole power cord is plugged into the trailer and has the proper polarity and voltage to
the tarp system. Positive is on the top post.
2. Check that the tarp system circuit breaker near the tractor battery is reset, if applicable.
3. Turn on the tarp system by pressing the (Open) & (Close) buttons simultaneously on the keypad for
3-5 seconds until the LED and buttons illuminate.
4. Test the remote functions of the tarp system by pressing the (Open) & (Close) buttons simultaneously on the
remote 3-5 seconds to verify keypad button failure.
5. Check for grease, dirt, and corroded connections at the battery terminals, circuit breaker and also at the trailer
power receptacle plug and outlet.
6. Check for voltage on the back side of the 2-pole trailer receptacle. Also check for corrosion and looseness.
7. Check for proper connection of the communication cable between the inner control box and the RF keypad.
8. Unplug the power receptacle, wait 10 seconds, re-plug truck power and verify operation.
Tarp system powers on but does not function when pressing either (Open) or (Close),
no ash codes are present.
1. Check for low voltage & loose connections.
2. Test the remote functions of the tarp system to verify keypad button failure.
3. Check for loose & corroded connections at the motor terminals and inspect the wires from the motor to
the inner control box located in the nose of the trailer.
4. Unplug the power receptacle, wait 10 seconds, re-plug truck power and verify operation.
Tarp system does not function and a red/orange ashing light is present on the
RF keypad, indicating an error code. See error code explanations below: (Codes will ash,
pause, and repeat until problem is corrected.)
a) Three ashes indicates an Overheat Protection issue. This typically occurs if the system has been started
and stopped rapidly in a short period of time. Also, it can indicate increased drag in the tarp system causing
excess amperage. Check that set screws in control box are tight. Re-check the tarp system after a cool down period.
b) Four ashes indicates an Over Voltage Protection issue. Using a voltmeter, check the tractor batteries &
alternator for voltage exceeding 15.5 volts.
c) Five ashes indicates an Under Voltage Protection issue. Using a voltmeter, check the system for low voltage.
Also check all connection points for looseness and corrosion including battery terminals, circuit breaker, power
cord, and receptacle plug. Connect an alternate power source to verify.
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