Sun Country Highway
Contactor Coil Not Energizing
Charger LED indicates ready, but when plugged in, no relay click is heard and vehicle does not charge.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Open contactor coil, Broken coil wire or connector, Faulty coil driver transistor on control board, Safety interlock preventing coil activation
How to Fix / Troubleshooting
Safety first: The contactor switches high current. Only qualified persons should test it.
- Listen for click: If no click is heard when the vehicle requests charge, suspect the contactor coil or its control.
- Check coil wiring: With power off, verify that the coil wires are firmly connected to the contactor and control board.
- Coil resistance test: A technician can measure coil resistance with a multimeter. An open circuit indicates a failed coil; replace the contactor.
- Board driver check: If the coil is good but never energizes, the control board’s driver circuit or safety logic may be faulty. Replace the control board after verifying no active safety faults.
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Repair Difficulty
Hard
4/5
Required Part
Main Power Contactor
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