Alternator Service
Keep Your Battery and Electronics Powered With Expert Alternator Service
Your vehicle’s alternator does more than you may realize. It’s responsible for powering essential electrical systems — from headlights and dashboard electronics to keeping your battery charged. If it fails, your car won’t just struggle — it might not start at all.
At Stone Automotive, we specialize in complete alternator service and replacement, helping drivers avoid electrical failures, poor battery health, and inconvenient breakdowns.
How Does an Alternator Work?
The alternator is a key part of your car’s charging system, converting mechanical energy from the engine into electrical energy to run your vehicle's systems and recharge the battery. Here’s how the process works:
- Drive Belt spins the alternator using engine power.
- Rotor Assembly rotates to create a magnetic field.
- Stator Winding interacts with that field to produce AC (alternating current).
- Rectifier converts AC to DC (direct current), which your vehicle needs.
- Voltage Regulator ensures steady voltage output to prevent overcharging or undercharging the battery.
A failure in any of these systems can reduce charging efficiency and lead to total electrical failure.
Key Components of Your Alternator
Our technicians are trained to inspect and repair all core alternator components, including:
⚙️ Stator & Rotor Assembly – Produces the electricity needed to power your car.
⚙️ Bridge Rectifier – Converts the energy into usable current for your vehicle.
⚙️ Voltage Regulator – Maintains a safe, stable voltage output.
⚙️ Brushes & Slip Rings – Transmit current between moving and stationary parts.
⚙️ Cooling Fan – Keeps the alternator from overheating during operation.
At Stone Automotive, we use advanced diagnostics and electrical testing tools to pinpoint faults in these components and ensure your alternator is working at its best.
Signs of a Failing Alternator
If your vehicle shows any of the following symptoms, it may be time for an alternator inspection or replacement:
🔋 Dimming or Flickering Lights
Headlights and interior lights losing brightness? It’s a common sign of power loss in the electrical system.
🔌 Repeated Battery Issues
If your battery keeps dying, your alternator might not be recharging it properly. Let us test the battery voltage and charging output to find the cause.
⚠️ Dashboard Warning Light
Many vehicles display a battery or charging system warning icon when the voltage drops. Don’t ignore it — get a professional checkup right away.
🔊 Grinding or Squealing Noises
A worn or loose drive belt can affect alternator function and cause noise under the hood. This impacts both belt tension and system performance.
📉 Electrical Malfunctions
From failing power windows to glitchy infotainment, unresolved alternator problems can lead to widespread electrical faults.
Our Alternator Service Includes:
- Complete alternator diagnostics
- Voltage output and drop testing
- Drive belt inspection and replacement
- Electrical system checks
- Alternator removal and replacement (if needed)
- Battery charging system testing
Whether your issue is with the voltage regulator, stator winding, or just belt wear, we’ll identify it quickly and get your vehicle back to full power.
Why Choose Stone Automotive
for Alternator Repair?
Since 2010, Stone Automotive has been a trusted name in vehicle diagnostics and electrical repairs. Our ASE-certified technicians bring experience, accuracy, and efficiency to every alternator replacement and service appointment.
We’re committed to keeping your vehicle powered, safe, and running at peak performance.
📞 Call us at (636) 566-6104
📍 Visit us at 191 East Ave, Winfield, MO 63389
💻 Book your alternator service online now and avoid unexpected breakdowns later.
