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Auto Electrical Repair Specialists in Columbus, OH
Electrical problems are the hardest automotive issues to diagnose — and the easiest to misdiagnose. You can't see electricity. You can't hear a corroded connector. A single broken wire buried in a harness can cause symptoms that seem completely unrelated to the actual failure. That's why most general repair shops struggle with electrical work: it requires different tools, different training, and a different way of thinking.
At Petty's Auto & Electric Service, electrical repair isn't a sideline — it's our foundation. The shop was built on electrical diagnostics, and it remains our core specialty. We use wiring diagrams, multimeters, oscilloscopes, and factory-level scan tools to trace problems to their root cause. When other shops have given up or started guessing, that's usually when we get the call.
Petty's Auto & Electric Service — founded on electrical diagnostics, still the best at it after 40+ years.
Signs of Electrical Problems in Your Vehicle
Electrical faults show up in unpredictable ways. Some are obvious; others disguise themselves as mechanical or engine problems. Here's what to watch for:
- Battery dies repeatedly — if a new battery keeps going dead, something is draining it when the vehicle is off (parasitic draw) or the alternator isn't charging properly
- Dim or flickering headlights — can indicate a failing alternator, loose ground connection, or corroded wiring in the lighting circuit
- Dashboard warning lights that don't make sense — multiple unrelated warning lights appearing together often point to a wiring or module communication fault, not multiple system failures
- Electrical accessories acting erratically — power windows, locks, radio, or seat motors working intermittently; usually a connector, relay, or ground issue
- Car won't start — no crank, no click — could be the battery, starter, ignition switch, neutral safety switch, or a wiring fault anywhere in the starting circuit
- Burning smell from wiring — a hot or melting wire is a fire hazard; shut the vehicle off and have it towed to a shop immediately
- Fuses that keep blowing — a fuse protects a circuit; when the same fuse blows repeatedly, there's a short circuit somewhere that needs to be traced and repaired
- Instrument cluster goes dark or reads incorrectly — gauge malfunctions, dead speedometers, or erratic tachometers are usually caused by a failing cluster, bad stepper motor, or wiring issue
Our Electrical Repair Services
From a dead battery to a full wiring harness repair, we handle every type of automotive electrical work — modern and classic.
Electrical Diagnostics & Troubleshooting
We use wiring schematics, multimeters, oscilloscopes, and factory scan tools to systematically trace electrical faults. We don't guess and replace — we test, measure, and verify before recommending a repair. This is the service that defines our shop.
Parasitic Draw Testing
If your battery dies overnight or after sitting for a few days, something is drawing power when it shouldn't be. We connect an ammeter, isolate circuits one by one, and find the specific component responsible — whether it's a stuck relay, a module that won't sleep, or a faulty aftermarket installation.
Battery, Alternator & Starter Service
We test batteries under load, check alternator output and voltage regulation, and verify starter draw and engagement. When replacement is needed, we install quality components and confirm the entire charging circuit is functioning correctly — not just the single part.
Wiring Harness Repair & Fabrication
Corroded connectors, chafed wires, rodent damage, and deteriorated insulation cause intermittent and hard-to-find electrical problems. We repair damaged sections, replace connectors, and fabricate custom harnesses when needed — especially for classic vehicles where original parts are no longer available.
Lighting & Accessory Repair
Headlights, taillights, turn signals, interior lights, power windows, door locks, mirrors, and seat motors. We repair the wiring, switches, relays, and motors that power every electrical accessory in your vehicle.
Instrument Cluster & Module Diagnostics
Dead gauges, erratic readings, communication faults between modules, and dashboard warning lights that don't match the actual condition of the vehicle. We diagnose module-level issues using factory-level tools and CAN bus testing.
Why Choose Petty's Auto for Electrical Repair?
Electrical Is Our Specialty
Not a sideline, not an afterthought. Petty's was founded on electrical diagnostics. It's what we're known for and what we do better than anyone in Columbus.
We Find What Others Can't
Intermittent faults, parasitic draws, wiring gremlins that come and go — these are the problems other shops give up on. We have the tools, the patience, and the methodology to trace them to the source.
Classic Vehicle Wiring
We repair, rewire, and upgrade electrical systems on vintage and classic vehicles — including custom harness fabrication, charging system upgrades, and retrofitting modern fuse panels into older designs.
Modern Vehicle Expertise
Today's vehicles have 50+ modules communicating over CAN bus networks. We diagnose module communication faults, reprogram controllers, and trace network issues that general shops aren't equipped to handle.
Auto Electrical Repair FAQ
Common questions Columbus drivers ask about automotive electrical problems.
What kind of electrical problems can an auto electrician fix?
Everything powered by your vehicle's electrical system: batteries, alternators, starters, all lighting, power windows and locks, instrument clusters, wiring harness repairs, parasitic battery drains, module programming, ignition systems, and the sensors and actuators that control engine, transmission, and body functions. At Petty's, electrical repair is our core specialty — it's in our name.
Why does my car battery keep dying?
Usually one of three things: the battery is worn out (most last 3 to 5 years), the alternator isn't charging it properly, or something is drawing power when the vehicle is off — called a parasitic draw. A parasitic draw can be a stuck relay, a module that won't go to sleep, a badly wired aftermarket accessory, or even a trunk light staying on. Finding it requires systematic testing with an ammeter.
How much does auto electrical repair cost in Columbus?
Battery replacement runs $150 to $300. Alternator replacement is typically $350 to $700. Starter replacement ranges from $300 to $600. Parasitic draw diagnosis is usually $100 to $200 for diagnostic time, plus the cost of the faulty component. Wiring repairs vary widely based on complexity. We provide a written estimate before starting work.
Why do most shops struggle with electrical problems?
Because electrical diagnosis requires different tools and thinking than mechanical repair. You can't see electricity — you trace it with wiring diagrams, multimeters, oscilloscopes, and systematic testing. Many general shops aren't equipped for it. Petty's was founded as an electrical specialty shop, and that expertise is still our core strength.
Can you work on classic and vintage car electrical systems?
Yes — it's one of our specialties. Older vehicles have simpler wiring but unique challenges: corroded connections, deteriorated insulation, outdated fuse boxes, and components that are no longer manufactured. We repair, rewire, upgrade charging systems, retrofit modern fuse panels, and fabricate custom harnesses in-house.
What is a parasitic draw and how do you find it?
A parasitic draw is abnormal electrical drain on your battery when the vehicle is off. Normal draw is around 20 to 50 milliamps. Anything above that slowly kills the battery. We find it by connecting an ammeter in series with the battery, then systematically pulling fuses and disconnecting circuits to isolate which one is drawing excess current, then tracing the wiring to the specific faulty component.
Electrical Problem That Other Shops Can't Figure Out? That's Our Specialty
From dead batteries and parasitic draws to full wiring harness repairs on classic vehicles, the team at Petty's Auto & Electric Service has the expertise to find it and fix it. Serving Columbus, Westerville, Worthington, Gahanna, New Albany, Lewis Center, Powell, and the surrounding areas.
Request an Appointment Or call (614) 224-5566
Address
Address
330 Washington Ave
Columbus OH 43215
Hours of Operations
Monday-Friday; 8 a.m.-6 p.m.
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