Batteries
Battery testing with a digital analyzer, including capacity and CCA (Cold Cranking Amps) diagnostics. Installation of new batteries from all brands.
Quality services
Automotive Electrical Systems
Automotive electrical system repair. Electrical troubleshooting, battery and alternator installation, and wiring repair.
What Is an Automotive Electrical Service, and What Problems Does It Solve?
The automotive electrical systems is the system that supplies power to all of your vehicle's electrical components: from the engine starter to the lights, radio, and safety systems. In Fishers Mobile MechanicWe diagnose and repair all types of electrical problems, including batteries, alternators, starters, and wiring.
Emergency service for cars that won't start. We deliver batteries and alternators to your location. Call (317) 537-1331 for immediate assistance at the Hamilton County.
Modern vehicles rely on complex electrical systems that operate at 12 volts (or 48V in hybrids). An electrical failure can leave you stranded or cause intermittent problems that are difficult to diagnose. Our technicians use advanced diagnostic equipment to identify the exact cause of the problem.
Key Data on the Electric Power System
- Healthy battery: 12.6 V at rest, 13.5–14.5 V with the engine running
- Battery life: 3–5 years under normal conditions
- The alternator generates 13.5–14.5 volts and 50–150 amps
- The starter motor is drawing power 100–300 amps when starting up
Automotive Electrical Services We Offer
Diagnosis and repair of all electrical systems
Alternators
Charging system diagnosis, alternator voltage and amperage testing. Alternator replacement and voltage regulator repair.
Starter Motor
Diagnosis of starting problems, current draw test. Repair and replacement of starter motors and solenoids.
Wiring and Connections
Diagnosis of short circuits, broken wires, and corroded connections. Repair of wiring harnesses and replacement of connectors.
Lighting System
Diagnosis and repair of headlights, taillights, turn signals, interior lights, and brake lights. Upgrades to LED and HID.
Fuses and Relays
Diagnosis of blown fuses and faulty relays. Identification of the root cause leading to repeated fuse blowouts.
Troubleshooting Guide: Electrical System Voltages
Benchmarks for identifying problems
| Component | Condition | Normal Voltage | Report a Problem |
|---|---|---|---|
| Battery | Engine off (idle) | 12.4–12.7 V | Less than 12.2V = battery is dead |
| Battery | Engine running | 13.5–14.5 V | Less than 13.5 V = faulty alternator |
| Alternator | Engine idling | 13.8–14.2 V | More than 15 V = faulty regulator |
| Alternator | Engine at 2000 RPM | 14.0–14.5 V | Unstable voltage = damaged diodes |
| Start | During startup | 9.5–10.5 V | Less than 9V = low battery or faulty cables |
| Standby power consumption | Engine off, everything locked | 25–50 mA | More than 75 mA = current leakage |
Does Your Vehicle Show These Electrical Problems?
The engine won't start or starts slowly
Lights that flicker or dim
Battery that frequently runs out of charge
A burning smell near the dashboard
Fuses that blow repeatedly
The battery light is on the dashboard
Automotive Electrical Systems in Indiana
Home Electrical Service in Hamilton County
Fishers, IN
Fishers District, Geist, Fall Creek
Noblesville, IN
Downtown, Morse Reservoir
Carmel, IN
Arts District, Clay Township
Westfield, IN
Grand Park, Downtown
McCordsville, IN
Mt. Vernon Area
Zionsville, IN
Historic Downtown
Comprehensive Electrical Inspection
We identify the exact cause of your electrical problems
- Battery test using a digital analyzer
- Alternator voltage and amperage test
- Starter Motor Performance Test
- Detection of current leakage (standby power consumption)
- Detailed report with recommendations
Why Choose Fishers Mobile Mechanic for Electrical Work?
1
Accurate Diagnosis
We use digital multimeters, battery analyzers, and oscilloscopes to pinpoint the exact cause. We don’t guess—we diagnose.
2
Emergency Services
Is your car won't start? We'll come to your location with batteries and alternators. You don't need a tow truck for common electrical problems.
3
Cable Repair
Wiring problems can be hard to find. We have experience tracking down short circuits and faulty connections.
4
Quality Replacement Parts
We install batteries and alternators from reputable brands that come with a warranty. We do not use low-quality parts that fail prematurely.
Frequently Asked Questions About Automotive Electrical Systems
Q What does the automotive electrical service include?
This includes electrical system diagnostics, battery testing and installation, alternator and starter motor repair, wiring diagnostics, installation of electrical accessories, and lighting system repair.
Q What are the signs of electrical problems?
Common signs: difficulty starting the car, flickering lights, a dead battery, a burning smell, fuses that blow repeatedly, accessories that don't work, and the battery light coming on.
Q How long does a car battery last?
A typical battery lasts 3–5 years, depending on the climate and usage. In Indiana, with its hot summers and cold winters, they may not last as long. We recommend testing the battery annually after 3 years.
Q How do I know if the problem is with the battery or the alternator?
If the lights are dim, it's the battery. If the car starts with jumper cables but stalls when you disconnect them, or if a new battery drains quickly, it's the alternator. A voltmeter should read 13.5–14.5 V with the engine running.
Q Can you fix electrical problems at my home?
Yes, we offer on-site electrical diagnostics and repairs throughout Hamilton County. We bring diagnostic equipment, batteries, alternators, and specialized tools with us.
Having electrical problems with your vehicle?
On-site diagnosis and repair. Is your car not starting? We'll come to you.
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