Modern vehicles are rolling computers with hundreds of electronic systems working in concert. When electrical issues arise — whether a dead battery, a failed alternator, mysterious warning lights, or complex wiring faults — you need technicians with both the diagnostic tools and the experience to find the problem efficiently.
Hahn Automotive's technicians in Santa Rosa specialize in automotive electrical diagnostics. We regularly solve electrical problems that other shops have given up on, using professional scan tools, wiring diagrams, and methodical diagnostic procedures.
From simple battery replacements to tracing intermittent shorts through complex wiring harnesses, we approach every electrical job with patience and precision.
Signs You Need Electrical Repair
Our Process
Battery & Charging Test
We start with a comprehensive battery and charging system test to establish the baseline health of your electrical system.
Diagnostic Scan
We pull all fault codes and perform live data monitoring to identify which systems are affected and how.
Wiring & Component Testing
Using wiring diagrams specific to your vehicle, we test circuits, connectors, and components to pinpoint the fault.
Repair & Verification
We complete the repair and verify all electrical systems are operating correctly before returning your vehicle.
Why Choose Hahn Automotive?
Electrical Specialists
Electrical diagnostics require patience and skill. Our technicians have traced complex electrical faults other shops couldn't find.
Proper Tools
We use professional diagnostic equipment including oscilloscopes and dedicated wiring diagnostic tools.
All Makes Covered
From domestic trucks to European luxury vehicles, we have the wiring diagrams and software for virtually every make.
No Guesswork
We diagnose before we repair. We won't replace parts on a hunch — we verify the fault first.