Electrical Diagnostics & Repairs

Q: What is electrical diagnostics?

Electrical diagnostics involves using specialist diagnostic tools, testing equipment & extensive knowledge to identify faults within your vehicle’s electrical systems, such as infotainment, sensors, cameras and batteries.

Q: How do you diagnose electrical faults?

We use a combination of vehicle-specific diagnostics, fault code reading, live data analysis, and hands-on testing, allowing us to accurately pinpoint the root cause rather than guess.

Q: Will you repair the fault once it’s diagnosed?

Where possible, yes. Once the fault is identified, we’ll advise on repair options, costs, and timescales before carrying out any work.

Q: How long does electrical diagnostics take?

Most diagnostic sessions take 2-3 hours, depending on the fault. More complex or intermittent issues may take longer, and we’ll keep you informed throughout.

Expert Electrical Diagnosis and Repairs

Keep your vehicle running smoothly and reliably with our expert electrical diagnostics and repair services. Modern vehicles rely on complex electrical systems, and even minor faults can lead to performance issues or system failures. Our experienced technicians use advanced diagnostic tools to accurately identify and repair problems with wiring, sensors, batteries, alternators, lighting, and electronic control units (ECUs). Whether it’s a warning light, intermittent fault, or complete system failure, we’ll find the root cause and restore everything to proper working order. With professional testing, precise repairs, and quality components, we ensure your vehicle’s electrical system performs safely and efficiently.

Trusted by clients across the UK

Frequently Asked Questions

What is electrical diagnostics?

Electrical diagnostics involves using specialist diagnostic tools, testing equipment & extensive knowledge to identify faults within your vehicle’s electrical systems, such as infotainment, sensors, cameras and batteries.

What types of electrical problems can you diagnose?

We can diagnose issues including battery drain, non-working accessories, infotainment faults and others.

How do you diagnose electrical faults?

We use a combination of vehicle-specific diagnostics, fault code reading, live data analysis, and hands-on testing, allowing us to accurately pinpoint the root cause rather than guess.

Will you repair the fault once it’s diagnosed?

Where possible, yes. Once the fault is identified, we’ll advise on repair options, costs, and timescales before carrying out any work.

How long does electrical diagnostics take?

Most diagnostic sessions take 2-3 hours, depending on the fault. More complex or intermittent issues may take longer, and we’ll keep you informed throughout.

Your Car Upgrade Specialist Since 1977

Founded in Reading in 1977, John Kleis Audio has been a trusted name in in-car entertainment for nearly five decades. From the early days of cassette players to today’s cutting-edge digital upgrades, the company has built its reputation on quality, reliability, and expert installation.

Still family-run and based on Basingstoke Road, John Kleis Audio continues to lead the way in premium audio, vehicle security, and custom car technology — delivering precision, innovation, and service you can trust.

Decades of Expertise

With over 45 years in the industry, we’ve set the standard for in-car entertainment and vehicle technology since 1977.

Quality You Can Trust

We’re known for precision installations, reliable products, and exceptional customer service that’s earned us a loyal following across the Thames Valley.

Innovation & Training

Our team stays ahead of the curve, constantly updating skills and equipment to bring you the latest in-car audio, tech, and security solutions.

Award-Winning Service

As a FOUR MASTERS authorised dealer and ICE Award winner, we deliver professional results backed by proven recognition in our field.