- EV charging
- EV charger
2 RED BLINKS
Tesla 2 RED BLINKS: ground assurance failed because high resistance was detected in the earth path
Risk level
Critical
Stop using the equipment and contact a professional.
Urgency
Immediate
Quick answer
2 RED BLINKS means ground assurance failed because high resistance was detected in the earth path in the cited charger family. The deciding observation is whether the installation has recently changed or the blink follows work on the panel, junction box or transformer. Do not infer a failed part from the code alone.
Safety first
What to do now
- Capture the exact charger, vehicle and pattern
Photograph 2 RED BLINKS and record the Tesla model, part/serial number, vehicle model, cable used, charge stage and approximate time. Do not clear the event before those facts are saved.
- Run the one deciding check
Leave charging disabled. Record recent electrical work and the exact two-blink pattern; do not open panels or attempt an earth/neutral correction. Record whether the installation has recently changed or the blink follows work on the panel, junction box or transformer. Change one condition only.
- Use recurrence as the stop point
A recent installation change is a strong handoff clue, but only measurement can prove which bond or connection is wrong. Without a recent change, high earth resistance remains an installation condition, not evidence that the Wall Connector electronics should be replaced.
What you must never do
- Do not attempt this professional task: Measured handoff for 2 RED BLINKS
What a technician must be able to justify
A technician is coming
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Measured handoff for 2 RED BLINKS
What they doMeasure the complete earth path and all upstream bonds, terminals and junctions, including transformer guidance where applicable, before touching the charger.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- EV charging
- Brand
- Tesla
- Product type
- EV charger
Known code variants
- 2 clignotements rouges Wall Connector
- 2 lampeggi rossi Wall Connector
- 2 parpadeos rojos Wall Connector
- 2 red blinks Wall Connector
- 2 rote Blinkzeichen Wall Connector
- Tesla 2 clignotements rouges
- Tesla 2 lampeggi rossi
- Tesla 2 parpadeos rojos
- Tesla 2 red blinks
- Tesla 2 rote Blinkzeichen
- Tesla Wall Connector 2 RED BLINKS
What it means
Tesla’s official documentation defines 2 RED BLINKS as ground assurance failed because high resistance was detected in the earth path. That is the protection or controller state, not a universal component diagnosis. A recent installation change is a strong handoff clue, but only measurement can prove which bond or connection is wrong. Without a recent change, high earth resistance remains an installation condition, not evidence that the Wall Connector electronics should be replaced.
Warnings and stop conditions
- Criticalsource verified
Smoke, burning smell, sparks, water, visible damage, abnormal heat or repeated protective-device trips means stay clear and leave charging disabled. Never open the charger, panel or connector and never probe voltage yourself.
Evidence: Troubleshooting a Wall Connector — fault codes
Sources and technical references
- 1
Troubleshooting a Wall Connector — fault codes
Tesla · official_doc
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