General Motors
Overheating at Connector Contacts
Visible discoloration, browning, or melting on the GM charger’s J1772 connector or at the point where the cable enters the handle.
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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
High resistance connection at power pins, Worn or loose contacts in connector, Prolonged high‑current operation with marginal contact pressure, Contamination on pins increasing resistance
How to Fix / Troubleshooting
Safety first: Immediately stop using the charger and turn OFF the breaker. Overheated connectors are a fire hazard.
Steps:
- Do not attempt repair: Do not try to clean or reshape burned contacts; this will not restore safe operation.
- Document damage: Take clear photos of the damage for warranty or insurance claims.
- Replace assembly: Arrange for replacement of the GM J1772 cable and handle assembly by a qualified technician or replace the entire charger if the connector is not separately replaceable.
Do not resume charging until the damaged components have been replaced and inspected.
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Repair Difficulty
Hard
4/5
Required Part
GM J1772 Charge Handle and Cable Assembly
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