Electrical Defects in South Carolina Lemon Law Cases

Modern vehicles are rolling computers — over 100 ECUs in a typical late-model vehicle communicate over CAN bus / LIN bus / Ethernet. Electrical defects (parasitic battery drain, alternator failure, BCM failures, wiring-harness corrosion) meet SC’s impairment standard under § 56-28-10. SC’s humid climate and coastal salt-air exposure (Charleston, Myrtle Beach, Hilton Head) accelerate electrical-component degradation.

Why electrical defects qualify

• Impairs use — vehicle won’t start, won’t charge, modules fail intermittently.
• Substantially lowers market value — documented electrical issues substantially reduce resale.
• Safety implications — random electronics shutdowns at highway speed (stalling, ABS off, airbag fault), unintended acceleration concerns.

Common electrical defect patterns

Parasitic battery drain

• Symptoms: dead battery overnight, premature battery replacement (<2 years).
• Causes: module that doesn’t sleep, faulty BCM, faulty infotainment.
• SC heat: Charleston, Columbia, Myrtle Beach summers shorten battery life.

Alternator / charging system failure

• Symptoms: battery warning light, electrical brownouts, dimming lights.
• Causes: alternator failure, voltage regulator failure, wiring harness corrosion.

BCM (Body Control Module) failures

• Symptoms: cascading electrical anomalies — power windows fail, door locks fail, lighting failures.
• Common in: GM trucks/SUVs, Ford F-150, Stellantis Jeep/Ram, Honda (newer years), BMW X-series (Spartanburg-built).

Wiring-harness corrosion — coastal SC paradigm

• Symptoms: intermittent electrical issues that worsen over time — sensors fail, modules report communication faults.
• Causes: salt-air corrosion of connector pins, harness chafing.
• Affected areas: Charleston, Berkeley, Dorchester, Beaufort, Colleton, Hampton, Jasper, Horry coastal communities.

Infotainment cascading failures

• Symptoms: head-unit reboots, freezes, fails to recognize media devices, then progressively affects other systems.
• Examples: Tesla MCU2 eMMC failure, Uconnect freezes (Stellantis), Sync issues (Ford), MBUX (Mercedes), iDrive (BMW Spartanburg-built).
• Safety implication: backup camera failure under FMVSS 111.

Fuel-pump electronic failures

• Symptoms: stalling, no-start.
• Examples: Toyota / Lexus 2020 fuel-pump recall.

Sensor failures

• Symptoms: single sensor failure causes downstream electronic anomalies and CEL.

Tesla-specific electrical issues

• MCU2 eMMC flash memory failure — Tesla recall.
• 12V auxiliary battery failures.
• HV battery contactor failures.
• Heat-related: SC summer heat similar to Phoenix stress on Tesla electronics.

Documentation for an electrical case

• Repair orders for each attempt.
• Diagnostic codes — pull and document ALL codes.
• Photos / video of intermittent failures.
• Manufacturer-app data if available.
• Vehicle inspection report from qualified independent shop.

Manufacturer defenses to watch

• “Aftermarket equipment” — alleging that aftermarket stereo, alarm, dashcam caused the issue.
• “Owner-caused damage” — water damage, jump-start damage.
• “Intermittent / cannot duplicate” — recurring “no problem found” diagnoses are themselves basis for § 56-28-30 presumption.
• “Module software updated” — but the defect persists.

Coastal SC corrosion specifics

For coastal SC electrical-corrosion cases:

• Document the corrosion with photos of connector pins, harness chafing, ground straps.
• Reference manufacturer’s corrosion-protection warranty — typically 5-7 years separate from base warranty.
• Compare to inland same-make/model.
• Consider class-action exposure.

SCUTPA public-interest pleading for electrical defects

Electrical defects can satisfy SCUTPA’s public-interest element through:

• NHTSA complaints on parallel electrical issues.
• Manufacturer TSBs documenting industry-wide patterns.
• Class action history.
• Coastal-corrosion regional pattern.

Bottom line

Electrical defects in modern vehicles are increasingly common and complex. The impairment standard under § 56-28-10 is easily satisfied for persistent electrical issues. SC’s heat and coastal salt-air exposure create distinctive case patterns. Document diagnostic codes carefully, use manufacturer-app data where available.

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