Modern vehicles depend on electricity for everything from starting the engine to running the computers that manage it. Music City Auto Repair provides battery and electrical service in Hermitage, TN for drivers who come to us from Nashville and the surrounding communities.
We work on domestic, Asian, European and hybrid vehicles. A slow crank or a dead battery is not always the battery’s fault, so we test the battery, the charging system and the starter together to make sure the part we replace is actually the one causing the problem.
Signs of a battery or electrical problem
- Slow or labored cranking. The engine turns over sluggishly, especially on cold mornings.
- Clicking when you turn the key. Often a weak battery or a poor connection, sometimes a failing starter.
- Battery or charging warning light. This light usually points to the charging system rather than the battery itself.
- Dim or flickering lights. Headlights or dash lights that brighten and fade with engine speed can mean a charging issue.
- Corrosion on terminals. White, green or blue buildup can block current and cause intermittent starting trouble.
- Battery that keeps going dead. Something may be draining power after the car is shut off.
- Swollen or leaking battery case. Replace it promptly and avoid handling it bare-handed.
What our battery and electrical service can include
- Battery voltage check
- Battery charge and discharge load test
- Battery tie-down check and terminal cleaning
- Battery replacement with the correct size and type for your vehicle
- Alternator and charging system testing
- Starter testing and replacement
- Belt operation and wear check, and belt replacement
- Parasitic drain testing and electrical fault diagnosis
- Safety inspection of lights and signals
How battery and electrical service works
- Request an appointment. Schedule online or call 615-600-5994. Tell us whether the problem is a no-start, a warning light or something that happens intermittently.
- Testing and recommendations. We test the battery, charging output and starter draw, and trace any drain or wiring fault. You get a clear explanation and an estimate before we replace anything.
- Repair. With your approval, we replace the failed component or repair the circuit.
- Pick-up. We retest the system to confirm it is charging properly and go over the results with you. Affirm financing is available, subject to approval by Affirm.
What drains batteries, and how to get more life from yours
A typical car battery stores energy chemically and delivers a large burst of current to the starter, then the alternator takes over, running the electrical system and recharging the battery while the engine runs. When either half of that partnership weakens, starting problems follow.
Many people assume cold weather kills batteries, and it is true that cold is when weak batteries finally give up. But heat does much of the damage beforehand by speeding up the internal chemical breakdown. After a hot Tennessee summer, a battery may look fine until the first chilly morning reveals how much capacity it has lost.
Short trips are another factor. Starting the engine uses a lot of energy, and a quick drive may not run long enough to replace it. Vehicles that sit for long periods also lose charge, and modern cars draw a small amount of power even when they are off. Keep terminals clean and tight, make sure the battery is held down securely so vibration does not damage it, and ask for a load test during routine maintenance. Vehicles with start-stop systems often require a specific AGM or enhanced battery, so use the type listed in your owner’s manual.
Related services
- Check Engine Light & Engine DiagnosticsCheck engine light on or flashing? We go beyond reading a code to test the system, find the actual cause and explain the fix before work begins.
- Oil ChangesLube, oil and filter service with the oil your engine is designed for, plus a quick check of fluids, belts and tires while your car is in the bay.
- A/C & Heating RepairWarm air from the A/C or no heat in winter? We inspect, find leaks and repair car air conditioning and heating systems, then explain the fix first.
- Transmission Service & RepairSlipping, harsh shifts or a fluid leak? We inspect automatic, manual and CVT transmissions, explain the findings and recommend the right repair.
Frequently asked questions
How long does a car battery usually last?
Battery life depends on climate, driving habits and the battery type, but many last only a few years. Heat is especially hard on batteries, so summers in Middle Tennessee can shorten their life. Having the battery load tested during routine service gives you warning before it leaves you stranded.
Why does my car battery keep dying?
Repeated dead batteries usually come from one of three things: a battery that can no longer hold a charge, a charging system that is not recharging it properly, or a parasitic drain where something keeps drawing power after the car is off. Testing each of these pinpoints the cause.
How can I tell if it is the battery or the alternator?
If the car starts with a jump and then runs fine but will not restart later, the battery is a likely suspect. If the car dies while driving, the lights dim and flicker, or a battery warning light comes on while the engine is running, the alternator or charging system is more likely. Testing both is the reliable way to know.
Can you test my battery before it fails?
Yes. A charge and discharge load test shows how well the battery performs under the demand of starting the engine, which is a better indicator of its remaining strength than a simple voltage reading.
Do hybrid vehicles have a regular 12-volt battery?
Most hybrids have a high-voltage battery that helps power the vehicle and a separate conventional 12-volt battery that runs accessories and boots up the vehicle's computers. If that small battery is weak, the hybrid may not start even though the main battery is fine.