Diagnostics & Electrical

Mobile Diagnostics & Electrical
Repair Service in Louisville, KY

For skilled mobile diesel repairs and services in Lexington, Kentucky, turn to Mac’s Diesel and Trailer Repair. Our solutions are customized to ensure that your buses operate at their best.

All You Need For Your Truck & Trailer Care and Maintenance On the Road

A complete assessment of a truck’s electronic control modules (ECMs) and sensors is carried out on-site during a truck diagnostic test. Our advanced diagnostic equipment thoroughly examines the truck’s systems, pinpointing any issues related to engine performance, emissions, and overall operation. 

These problems may appear as difficulties in starting the engine, unpredictable behavior of the instrument panel, or flickering lights. Our skilled technicians promptly identify and fix electrical issues, guaranteeing that your heavy-duty trucks function smoothly and dependably.

We Fix Your Diesel Emergencies!

semi truck alignment

ECM Reprogramming: It is essential to reprogram the Electronic Control Modules (ECMs) in order to optimize engine performance and resolve software-related issues. Our skilled technicians use advanced tools to reprogram ECMs, ensuring that your heavy-duty trucks comply with the latest performance standards and emissions regulations.

Replacement of Wiring Harness: Damaged wiring harnesses can cause electrical malfunctions that affect various truck components. Our experts conduct thorough inspections to identify and replace damaged or corroded wiring harnesses with precision.

Battery System Diagnostics: Our diagnostic services evaluate battery health and charging system efficiency, while also identifying potential issues. Whether it involves replacing a worn-out battery or addressing charging system problems, we ensure that your heavy-duty trucks start reliably and consistently.

Alternator Replacement: Our technicians diagnose alternator issues, such as worn-out brushes or faulty voltage regulators. If necessary, we carry out precise alternator replacements to ensure that your heavy-duty trucks maintain a consistent power supply for all electrical components.

Client Feedback & Reviews

See What Customers Say About Our Services

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Anatolie Badila profile picture
Anatolie Badila
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This guys are professionals for sure. Jeff is very young but knows how to find the problem and fix it, amazing. I recommend this guys, they are 5+ .
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Dawson Rainey profile picture
Dawson Rainey
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Buddy whooped my broken trailer up in about 10 minutes on the side of I-165. Mack and his buddy are the real deal! Would recommend them for any job.
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richard Faulk profile picture
richard Faulk
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Found short in alternator wiring, replaced radiator and got me back on track he road.
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Tony Stewart profile picture
Tony Stewart
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Prompt service & courtesy a plus. Glad to have them in the area when I broke down. Blessings upon you and yours
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John Mercurio profile picture
John Mercurio
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Had turbo problems and needed to get it fixed en route from Atlanta to Cincinnati, Mac got me on the road again with a few hours of work Saturday morning. Fast, friendly, and fair priced💯 Will use again if in the area!💪🤘 Thanks!
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Eva Marie Allison profile picture
Eva Marie Allison
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We have been using Mac's Diesel here in Lexington and they are extremely easy to work with, from response time, quality of work and cost.
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Luke Milles profile picture
Luke Milles
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nice and helpful