Cadillac Overheating Connector / High Contact Resistance

Charger cable or connector becomes very hot to the touch during charging.

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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

Worn or weakened spring contacts in J1772 handle, Corrosion on connector pins, Undersized or damaged cable conductors, Loose crimp connections inside handle

How to Fix / Troubleshooting

Safety first: If the connector or cable is too hot to hold comfortably, stop charging immediately. Turn OFF the breaker and unplug the connector from the vehicle once it has cooled.

Steps to try:

  • Inspect pins: Look for discoloration (darkening, pitting) on the metal pins of the J1772 connector. This indicates overheating.
  • Check cable routing: Ensure the cable is not coiled tightly or covered by insulating materials while charging, which can trap heat.
  • Reduce current: If possible, lower the maximum charging current in the app or vehicle settings and monitor temperature.

When to call a technician: Overheating connectors are a fire risk. A technician should replace the J1772 handle and cable assembly and inspect the vehicle inlet if there are signs of damage.

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Repair Difficulty

Medium 3/5

Required Part

Cadillac EVSE J1772 Handle and Cable Assembly
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