Auto Electric in Raleigh, NC

Welcome to Johnny's Auto & Marine Electric Service

Electrical repairs, starter, alternator & generator repair, we rebuild alternators, automotive, marine, heavy truck & industrial, servicing the entire triangle area; located in Garner, NC. 

Johnny's Auto & Marine Electric service means quality work.  We take pride in our work. We can also service marine electric!

Today's auto electric systems are getting more intricate and are stressing the limits of current technology but they are basically the same design as 30 years ago. 

Before replacing any battery due to a failure, have the battery and the car's electrical system tested for proper functioning.  Replacing a dead battery only to have another few weeks later due to a weak alternator or a parasitic drain on the system is not only frustrating but can be expensive and dangerous as well.   

We rebuild alternators!

An average battery should last 3-5 years in average climates but those in high heat or extreme cold areas may last only 2-3 years.  The replacement battery should always have the same or higher CCA rating (cold cranking amps) as the original and be of the same or compatible "group size" to fit the battery tray and cable connections. 

Your car's electrical system should be completely checked and tested every two years or whenever serviced for any type of drivability problem.  Many problems associated with day-to-day drivability are caused by voltage variations and must be the first step in troubleshooting any problem.  This is due to the use of computerized controls in most cars these days and even quite minor voltage changes can alter the controls. 

Johnny's Auto & Marine Electric Service has proudly continued to build on its excellence and quality products through many state-of-the-art machinery and computerized equipment.  We use factory scanners that are used by dealerships and we are capable of programming to the same standards as your dealership. 

AUTO ELECTRIC: ALL MAKES & MODELS

• Tune Ups
• Fuel & Emissions Systems
• Starting & Charging Systems
• Electrical Parts & Repair On
  Switches, Wipers, Windows,
  Motors, Door Locks, Lighting
• Trailer Wiring
• Air Conditioning / Heating
• Computerized Control Systems 
• Your Alternator 

The alternator produces electricity used to maintain battery storage charge and to help run all the electrical accessories, including the ignition and the engine control systems.  It is belt-driven by the engine and produces an Alternating Current (AC), which is converted internally to 12 volts Direct Current (DC) by the Diode Bridge or rectifiers.

AC current cannot be stored but is much more efficiently produced, which is why cars no longer use generators but use alternators and convert the electricity to DC.  Most alternators now use internal voltage regulators to maintain the proper system voltage, from 12.6-14.5 volts.  You should check your car's repair manual or with your local dealer to obtain the exact proper voltage for your car. 

Contrary to popular belief, an alternator does not constantly produce electricity.  It cycles on and off as demand goes up and down.  The battery buffers it from the electrical demands of the car, and it only works enough to maintain system voltage.  At peak efficiency and for longest life, the alternator should be charging no more than about 50% of the time. 

However, with the demands placed on the system by heat and by extraneous electrical devices (i.e., high powered stereos, running lights, etc. - see Power Demand Chart below), the alternator and battery are stressed even further.  The average alternator now is lucky to last 3-4 years, which is why a prematurely dead battery may actually be caused by a dead alternator. 

Our services include auto electric, starters, alternators, generator, diagnostic, marine, dc motors, rebuilding starters, rebuilding, alternators, and rebuilding generators. 

We rebuild starters, alternators, and generators for foreign and domestic automobiles, trucks, heavy equipment & boats. 

We are affiliated with the Better Business Bureau and the US Chamber of Commerce, Raleigh.

The bottom line is that no matter what you have - car, truck, boat, heavy equipment, or farm equipment - Johnny's Auto & Marine Electric can do the jobs.  Serving the Raleigh, NC area. 

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