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Electrical Troubleshooting & Diagnostics

Electrical Troubleshooting & Diagnostics for Heavy-Duty, Medium-Duty & Commercial Vehicles

When your truck or fleet vehicle experiences electrical issues, you need fast, accurate diagnostics you can trust.

At Eyre Heavy Duty, our technicians specialize in electrical troubleshooting for heavy-duty trucks, medium-duty vehicles, buses, RVs, and commercial fleets across Maryland. From starting and charging problems to advanced computer faults and wiring failures, we pinpoint the issue quickly and get your vehicle safely back on the road.

Mechanic performing Electrical Troubleshooting & Diagnostics

Electrical Diagnostics You Can Trust

Modern commercial vehicles rely on complex electrical and electronic systems. A single failing sensor, loose ground, or shorted wire can create performance problems, warning lights, or complete vehicle shutdowns.

Our electrical troubleshooting services include:

  • Computer & ECM diagnostics
  • Starting & charging system testing
  • Battery load testing
  • Alternator & starter diagnostics
  • Wiring harness inspections
  • Ground integrity testing
  • After treatment electrical diagnostics
  • Trailer electrical troubleshooting
  • ABS, DEF, and emissions system electrical faults
  • Sensor & module testing
  • CAN bus / communication network diagnostics

Using dealer-level diagnostic tools for major brands—including Freightliner, International, Peterbilt, Volvo, Kenworth, and Ford—our team identifies the true cause of electrical system failures and provides fast, effective repairs.

Common Electrical Issues We Repair

Electrical problems can be unpredictable and difficult to track. Eyre Heavy Duty’s technicians diagnose and repair issues such as:

  • Battery drain or no-start conditions
  • Dash warning lights (ABS, DEF, Check Engine, transmission)
  • Flickering or inoperative lights
  • Loss of power or intermittent shutdowns
  • Blown fuses or tripped breakers
  • Faulty sensors and control modules
  • Communication faults between vehicle systems
  • Trailer lighting and brake wiring issues
  • Alternator failure symptoms
  • Electrical shorts and corrosion damage

Whether it’s a simple fix or a complex wiring issue, we deliver accurate solutions the first time.

Mechanic performing Electrical Troubleshooting & Diagnostics

Advanced Diagnostic Tools for Faster Repairs

We use industry-leading diagnostic software to access live data, fault codes, system histories, and vehicle communication networks. This allows us to:

  • Identify intermittent electrical faults
  • Validate component and sensor performance
  • Detect wiring resistance and voltage irregularities
  • Inspect communication failures in multiplexed systems
  • Reduce guesswork and unnecessary part replacements

Accurate diagnostics mean faster repairs, lower costs, and less downtime for your fleet.

Electrical Troubleshooting for Fleets of All Sizes

Eyre Heavy Duty supports:

  • Heavy-duty trucks (Class 7–8)
  • Medium-duty trucks (Class 4–6)
  • Light-duty commercial vehicles
  • Bus fleets
  • RVs & motorhomes
  • Entertainer coaches
  • Municipal & government fleets
  • Trailer systems & wiring

Our technicians provide electrical repairs as part of regular maintenance, emergency service needs, and full fleet troubleshooting programs.

heavy duty truck repair

Vehicles & Industries We Serve

Our PM programs support a wide range of commercial and specialty vehicles:

  • Class 7–8 heavy-duty trucks
  • Medium- and light-duty trucks
  • Box trucks, delivery vans & work trucks
  • Bus fleets
  • RVs & motorhomes
  • Entertainer coaches
  • Municipal & county fleets

Common light duty vehicles we service include: full-size pickup trucks (e.g., Ford F-150, Chevrolet Silverado 1500, Ram 1500), cargo vans (e.g., Ford Transit Connect, Mercedes-Benz Sprinter), and smaller commercial vans.

Is your commercial truck or fleet vehicle in need of repair?

Call us for Electrical Troubleshooting & Diagnostics: 410-442-7418

Eyre Heavy Duty

13600 Triadelphia Rd., Glenelg, MD 21737

We proudly service trucks across Maryland including Baltimore, Annapolis, Frederick, Columbia, Silver Spring, and surrounding areas, as well as Washington D.C. For reliable truck repair and maintenance, choose Eyre Heavy Duty.

INTEGRITY & RESPECT

The values that we use to conduct
our business and treat our customers.