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Expert Diagnostics & Electrical System Service
Battery Testing & Replacement
Alternator & Starter Service
Computer Diagnostics
Lighting & Wiring Repair
Expert Electrical System Service in Eustis, FL
Modern vehicles are more complex than ever, with sophisticated electrical systems controlling everything from engine performance to safety features. When electrical problems occur, they can leave you stranded or cause significant inconvenience. At AJ Auto Repair in Eustis, we have the expertise and diagnostic equipment to troubleshoot and repair all automotive electrical issues.
From a simple dead battery to complex wiring problems, our certified technicians can diagnose the root cause and provide lasting repairs. We service all makes and models, foreign and domestic, and use quality parts that meet or exceed manufacturer specifications.
Warning Signs of Electrical Problems
- Engine won't start or cranks slowly
- Battery light or check engine light on
- Dimming or flickering lights
- Electrical accessories not working
- Burning smell or visible sparks
- Battery keeps dying
- Strange clicking noises when starting
- Dashboard warning lights illuminated
Our Electrical Services
Battery Service
Your battery provides the power to start your engine and run electrical systems. We test, service, and replace batteries to keep you on the road.
- Free battery testing
- Battery replacement
- Terminal cleaning & corrosion removal
- Charging system testing
- Battery cable repair
- Proper disposal of old batteries
Alternator Repair & Replacement
The alternator charges your battery and powers electrical systems while driving. A failing alternator will leave you stranded.
- Alternator testing & diagnosis
- Alternator replacement
- Drive belt inspection
- Voltage regulator testing
- Charging system analysis
- Electrical load testing
Starter Service
The starter motor cranks your engine to get it running. Starter problems are one of the most common reasons vehicles won't start.
- Starter motor testing
- Starter replacement
- Solenoid testing & repair
- Flywheel inspection
- Ignition switch diagnosis
- Starting system troubleshooting
Electrical Diagnostics
Modern vehicles have complex computer systems. We use professional diagnostic equipment to pinpoint electrical issues accurately.
- Computer system scanning
- Wiring harness inspection
- Circuit testing
- Sensor diagnostics
- Module testing & programming
- Electrical system analysis
Lighting Systems
Properly functioning lights are essential for safety and legal compliance. We repair all interior and exterior lighting issues.
- Headlight replacement & adjustment
- Tail light & brake light repair
- Turn signal troubleshooting
- Interior light repair
- Dashboard light replacement
- HID & LED lighting service
Wiring & Component Repair
Damaged wiring can cause multiple electrical problems. We trace, repair, and replace faulty wiring to restore proper function.
- Wiring repair & replacement
- Fuse & relay replacement
- Switch repair
- Connector repair
- Ground wire repair
- Custom wiring for accessories
Common Electrical Problems We Fix
Dead Battery
Symptom: Car won't start, clicking sound, no electrical power
Cause: Old battery, parasitic drain, charging system failure, leaving lights on
Solution: Battery testing, replacement if needed, charging system diagnosis
Alternator Failure
Symptom: Battery light on, dimming lights, electrical accessories failing, battery keeps dying
Cause: Worn alternator bearings, failed voltage regulator, broken drive belt
Solution: Alternator testing and replacement, belt inspection
Starter Problems
Symptom: Engine won't crank, clicking noise when starting, intermittent starting
Cause: Worn starter motor, failed solenoid, loose connections, bad ignition switch
Solution: Starter testing, solenoid replacement, connection repair
Wiring Issues
Symptom: Intermittent electrical problems, blown fuses, accessories not working
Cause: Damaged wiring, corrosion, rodent damage, loose connections
Solution: Circuit testing, wiring repair or replacement, connector cleaning
Lighting Failures
Symptom: Headlights not working, tail lights out, dashboard lights dim or off
Cause: Burnt bulbs, bad switches, wiring problems, fuse issues
Solution: Bulb replacement, switch testing, circuit repair
Computer System Errors
Symptom: Warning lights on, poor performance, features not working
Cause: Failed sensors, communication errors, module failures, software issues
Solution: Diagnostic scanning, sensor replacement, module programming
Our Electrical Diagnostic Process
1
Initial Assessment
We discuss your electrical problems and symptoms. Understanding when and how issues occur helps us diagnose efficiently.
2
Visual Inspection
We inspect battery, cables, wiring, and connections for obvious damage, corrosion, or loose connections.
3
System Testing
We test battery, alternator, starter, and electrical circuits using professional diagnostic equipment.
4
Computer Diagnostics
We scan your vehicle's computer systems for error codes and monitor live data to identify problems.
5
Detailed Diagnosis
We trace circuits, test components, and pinpoint the exact cause of electrical issues.
6
Repair Estimate
We provide a clear explanation of the problem and a detailed estimate before any work begins.
Electrical System Maintenance Tips
Test Battery Annually
Have your battery tested at least once per year, especially before summer and winter when temperature extremes stress batteries.
Keep Terminals Clean
Clean battery terminals and cables regularly. Corrosion prevents proper electrical flow and can cause starting problems.
Turn Off Accessories
Turn off lights, radio, and other accessories before shutting off your engine to reduce strain on the electrical system.
Address Warning Lights
Don't ignore battery or electrical warning lights. Early diagnosis prevents more expensive repairs and breakdowns.
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