Truck Diagnostics & Electrical Repair Services in Cumming, Iowa

Mechanic performing diesel engine diagnostics at Absolute Repair

Today’s heavy-duty diesel engines are notably more reliable than their ancestors, and with that comes an increase in complexity.  Their elaborate electrical systems require regular maintenance and service in order to ensure the best performance.  When your truck develops an issue, you need to have a trustworthy shop that you can rely on to have it diagnosed, serviced and repaired quickly so you can get back on the road and back to work. 

The diagnosis and repair of electrical problems is possibly the most time-consuming and difficult form of vehicle diagnosis. The electronic control units (ECU) in diesel trucks give diagnostic technicians access to sensors located throughout the engine compartment that provide performance data on various components. However, with many electrical systems, and connections buried deep under the seats, carpet, dash, and body panels of your truck, electrical problems require a great deal of knowledge, experience, and patience to locate and repair. Not to mention, modern, up-to-date technologies and diagnostic equipment. Our tech-savvy, educated and experienced technicians are able to use computer diagnostic systems to locate and target the exact cause of engine or vehicle failure with spot-on accuracy. Not only do you get quick diagnostics, but our systems also save you money that you may have otherwise spent on unnecessary assessments and repairs. 

Indicators of electrical issues

The number one indicator of an electrical issue will be a light (or array of lights) on your dashboard.  Beyond that, there are some other signs you may notice which could be your truck telling you there’s an electrical problem:

  • Damaged or failed battery
  • Dull headlights or brake lights
  • Faulty or discoloured wiring
  • The smell of burnt plastic
  • Faulty or discoloured wiring
  • Inability to start your engine

We diagnose and service all makes and models of heavy-duty diesel trucks and work closely with manufacturers to overcome challenges and develop comprehensive solutions that address our customer's needs. During your heavy-duty truck inspection, one of our highly skilled mechanics will perform a computerized scan to identify any problems. We understand the importance of getting problems fixed quickly, correctly and affordably. Our team of certified technicians utilizes a wide range of diagnostic software and has priority access to industry-wide information for every make and model vehicle.

What Our Customers are saying About Us


While on vacation recently we unfortunately encountered a broken axle on our travel trailer. Being from out of town and the fact that it was a Sunday evening we had no idea who to call for repair. The tow truck driver recommended Absolute Repair and we were towed to that facility. The tow truck driver notified the owner of Absolute Repair that we were in their parking lot. On Monday morning we were greeted by Andrew who evaluated the situation. Peter (the owner) and Andrew were very easy to work with and kept us informed of their efforts to secure a new axle. Once they had the axle they worked quickly and diligently to put the new axle on the trailer and we were back on the road late Monday afternoon. Peter himself worked with another tech to complete the repair. Peter and Andrew are both very knowledgeable, explaining in detail the repair, as well as being concerned for our comfort and offering us the use of their lounge. The repair price was very reasonable. Andrew even placed a follow up call to us the next day to make sure everything was fine with the trailer. We cannot speak highly enough of this company and would recommend them to anyone without hesitation. Our sincere thanks to Peter and Andrew for assisting us and getting us back on the road so quickly.

Steve & Debbie Genoff
Google Review

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Get in touch with us today for service.

 We also offer mobile service within a 60-mile radius from our shop in Cumming, IA and service Des Moines, Urbandale, West Des Moines, and Osceola in addition to surrounding areas.