Find the Problem Fast

What We Do

• Complete Electrical Diagnostics

Modern heavy-duty trucks rely on complex electrical systems and multiple interconnected control modules. At Lexington Diesel, we diagnose electrical problems using professional diagnostic equipment, wiring diagrams, circuit testing, and OEM-level software to find the actual source of the failure rather than simply replacing parts.

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• Starting & Charging Systems

We diagnose and repair no-start, slow-crank, intermittent starting, and charging problems. Services include testing and replacement of batteries, starters, alternators, battery cables, grounds, relays, fuses, switches, and other starting and charging system components.

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• Wiring & Electrical Repair

Damaged wiring can cause some of the most difficult problems on a truck. We locate and repair broken wires, corroded connections, damaged connectors, poor grounds, short circuits, open circuits, rubbed-through harnesses, and other electrical faults throughout the truck and chassis.

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• Computer & Control Module Diagnostics

Today's trucks use numerous electronic control modules to operate the engine, transmission, ABS, aftertreatment, body systems, and other components. We diagnose communication faults, module-related codes, CAN/J1939 network problems, sensor circuits, and module communication issues.

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• Lighting & Accessory Systems

We diagnose and repair headlights, marker lights, brake lights, turn signals, work lights, trailer lighting, switches, power outlets, and other electrical accessories. Whether you're dealing with one failed light or an intermittent electrical problem throughout the vehicle, we can trace and repair the issue.

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• Sensors, Actuators & Electronic Components

Modern diesel trucks depend on sensors and electronically controlled components throughout the vehicle. We test sensors, actuators, solenoids, switches, wiring, power supplies, grounds, and reference circuits to determine whether the problem is the component itself or the electrical system controlling it.

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• ABS & Trailer Electrical Diagnostics

We diagnose truck and trailer ABS warning lights, wheel-speed sensor faults, wiring problems, power and ground issues, ABS modules, and communication faults. We also troubleshoot trailer electrical systems including lighting, connectors, harnesses, and related components.

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• Parasitic Draw & Intermittent Electrical Problems

Electrical problems don't always happen consistently. We diagnose battery drains, intermittent no-starts, random warning lights, blown fuses, communication failures, and electrical problems that appear and disappear while the truck is operating.

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Advanced Heavy-Duty Electrical Diagnostics

Electrical problems can quickly become frustrating and expensive when parts are replaced without properly identifying the failure. At Lexington Diesel, our approach is to test the system, trace the circuit, identify the cause, and make the correct repair.

From a simple failed light or corroded wire to complex CAN/J1939 communication faults, control module problems, ABS issues, and complete no-start conditions, we have the diagnostic equipment and experience to handle heavy-duty truck electrical systems.

Our goal is to find the problem accurately, repair it correctly, and get your truck back on the road.

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