You can trust us with your electrical diagnostic testing and repair/replacement on your car, truck, van or SUV. We’ve been serving Milwaukee since 1972, and are well-equipped to work on any type of vehicle, foreign or doemstic.

Your car’s electrical system is a delicate and complex network. Ray’s OK Service has specialized diagnostic equipment to help identify problem areas in your car’s electrical systems. Our expert technicians know how to quickly sift through all the data to find these problems and fix them on the spot.

The Importance of Servicing Your Car’s Electrical System

Your car’s electrical system is imperative to its overall operation by giving power to the battery, starter, alternator, and more. Without it, your car wouldn’t even turn on. However, each car’s electrical system is different depending on its make, model, and year. 

Luckily, Ray’s OK Service team has top-of-the-line technology and experienced mechanics that have worked with almost every kind of vehicle you can imagine. They will diagnose your car’s issue and troubleshoot the problem immediately.

How Often Do I Need to Get an Electrical Diagnosis?

The average car battery lasts between three and six years, making four years the recommended time to replace an old battery. However, electrical problems do not always mean you have a battery problem. If you hear weird noises like clicking or grinding while starting your car, you should bring it in for an electrical diagnosis. Other signs of problems include:

  • The lights on the dashboard do not light up

  • The headlights are dim when you are driving at low speeds

  • Attachments and accessories don’t work (AUX/USB cords, phone chargers)

If you experience any of these problems, bring your car in for an electrical test to see where the problem is really coming from. 

Contact Ray’s OK Service to book your next heating and air conditioning repair appointment!

When you keep your car in top running condition, you will save time and money in the long run. A well-maintained vehicle provides safe travel for you and your family, giving you security and peace of mind.


Welcome to Ray’s OK Service. Conveniently located in Greenfield, Wisconsin on Loomis Road at I-894. We specialize in the maintenance and repair of foreign and domestic vehicles. Ray’s OK Service originally opened in 1972 by Ray Kurian Sr. and sons.  As a family, they built a thriving auto repair business.  A company that prides itself on skilled automotive repair services, up to date technology, fair honest pricing, and cordial customer service. Now serving 3rd Generation Customers!!

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