Alternator Repair & Replacement in Orange, CA

At Joseph Harrington Automotive, we specialize in diagnosing and repairing complex auto electrical systems, including alternators. As an ASE Blue Seal of Excellence shop, we ensure your vehicle’s charging system delivers consistent power for dependable performance. If your car is experiencing dim lights, frequent battery issues, or stalling, our team will determine whether your alternator is the cause and provide the right solution.

Signs of Alternator Problems

• Dim or flickering headlights and interior lights
• Battery warning light illuminated on dashboard
• Difficulty starting or repeated dead batteries
• Electrical accessories failing or working inconsistently
• Whining or grinding noises from engine bay
• Strong odor of burning rubber or electrical smell

Our Diagnostic Process

We don’t just swap parts—we perform a full charging system evaluation to confirm the alternator is the issue.

• Output Testing: Measures charging voltage and current under load.
• Voltage Regulator Check: Ensures stable output and prevents battery overcharging.
• Diode Test: Detects ripple voltage or failed rectifiers inside the alternator.
• Wiring & Ground Inspection: Identifies voltage drops and poor connections.
• System Balance Check: Confirms alternator, battery, and starter are operating together correctly.

Alternator Services We Provide

• Alternator testing and evaluation
• Alternator repair and rebuilds when possible
• Quality replacement alternators for all makes & models
• Drive belt and pulley inspection or replacement
• Voltage regulator and diode repair

Schedule Alternator Service

If you’re in Orange, California and suspect alternator problems, don’t wait until your vehicle leaves you stranded. Contact Joseph Harrington Automotive for accurate testing and dependable repairs today.

Request an appointment