Flickering gauges, random shutdowns, or dead starts don’t just happen—they’re signals that your truck’s electrical system is struggling. Heavy-duty diagnostic and electrical repair restores full control before it costs you a route.
Semi-Truck Electrical Repair in Mount Horeb, WI
Today’s trucks rely on dozens of electrical systems—from starters and alternators to ECMs and sensors. If just one part fails, it can take down the rest. Whether you’ve got battery issues, power loss, or a dashboard full of codes, we’ll find the cause fast.
At River Valley Diesel Services & Construction, we use advanced tools to diagnose and repair everything from wiring faults to failing sensors and charging systems.
Here’s what we can repair or replace:
- Batteries, alternator repair, and starter repair
- Fuse panels, relays, and circuit boards
- Shorted or damaged wiring
- ECM and electrical control systems
- Fault code diagnosis and clearing
- Diesel truck diagnostic tools and scanning
- Full electrical system repair and testing
If you’re dealing with flickering lights, trouble starting, or a sudden loss of power, don’t wait. Our diagnostic service pinpoints the issue quickly, so we can get your truck repaired and back in action.
Experience the River Valley Difference!
Service Multiple Trucks at Once: We can diagnose and service up to six trucks at the same time, reducing your downtime significantly.
Customer Service Focus: You’ll get quick updates, honest answers, and a team that works around your schedule—not the other way around.
Transparent Pricing: No vague labor charges or surprise fees. We explain everything before the work starts and stick to our quotes.
Easily Accessible: We’re located right off I-94 and I-151 in Mount Horeb, WI, making it easy to get here when your truck needs help.
FAQs
How can I get heavy-duty diagnostic and electrical repair?
Just call 608-574-5785 and schedule your heavy-duty diagnostic and electrical repair. We’ll find the issue fast, fix it right, and get your truck back on the road with no wasted time.
Can electrical wiring be repaired?
Yes, electrical wiring in heavy-duty diesel vehicles can be repaired. Damaged wires are typically cut, stripped, and reconnected using soldering or crimp connectors, then insulated properly. Repairs must meet durability and safety standards to prevent shorts, voltage drops, or system malfunctions.
What do diagnostics do?
Diagnostics in heavy-duty diesel vehicles identify faults by reading error codes from the vehicle’s onboard computer. They help detect issues in systems like the engine, transmission, brakes, and emissions. Accurate diagnostics reduce downtime by pinpointing problems quickly, guiding effective repairs and maintenance.
What areas do you serve for heavy-duty diagnostic and electrical repair?
We are based at 3200 Hwy 78, Mount Horeb, WI, near I-94 and I-151.
As well as Mount Horeb, WI, we also proudly service the following areas: Madison, WI; Janesville, WI; Wisconsin Dells, WI; Beaver Dam, WI; Fitchburg, WI; Middleton, WI; Sun Prairie, WI; Verona, WI; Stoughton, WI; Baraboo, WI; Portage, WI; Lake Delton, WI; Reedsburg, WI; Dodgeville, WI; Monroe, WI; Columbus, WI; Fort Atkinson, WI; Waunakee, WI; and Evansville, WI.
Contact Us About Truck Electrical Repair Now: Call 608-574-5785!
From a dead battery to full electrical failure, we’ve got you covered. Call 608-574-5785 today to schedule your truck electrical repair and get fast, accurate diagnostics from a team you can count on.
What They're Saying About Us
See why our customers consider River Valley Diesel Services & Construction their go-to repair shop in Mount Horeb, WI and the surrounding areas!
I was in a jam and they came out and got me fixed up quick I would definitely recommend them if you’re in a jam
Contact Us
Need roadside assistance, have questions, or want to schedule your truck or trailer in for a service or repair? Get in touch, we're open Monday through Friday from 7:00am to 5:00pm.