Heavy Duty Electrical
Repair
CAN bus diagnostics, wiring repair, alternators, starters, lighting, module programming — CTR provides complete electrical system diagnosis and repair for all commercial truck brands.
Truck Electrical Repair Experts
Electrical problems are the most misdiagnosed category in commercial truck repair. Symptoms like intermittent no-starts, phantom warning lights, gauge malfunctions, and mysterious drain-downs can originate from dozens of potential sources.
CTR's diagnostic approach is systematic — we do not replace parts hoping to solve the problem. We trace circuits, measure signals, analyze data, and identify the root cause before recommending any repair. Our OEM diagnostic platforms cover every major truck manufacturer.
Located on Armentrout Drive directly off I-85 at Exit 58. All electrical repairs backed by our 3-year, 36,000-mile warranty.
OEM Diagnostics
Same diagnostic software the dealerships use — full module access, programming, active testing.
CAN Bus Experts
Oscilloscopes, CAN analyzers, and systematic troubleshooting for multiplexed systems.
3-Year, 36K Warranty
Industry-leading warranty on all electrical repairs. Parts and labor covered.
30+ Years
From pre-electronic relay systems to the latest multiplexed CAN bus architectures.
Complete Electrical Repair Services
From CAN bus diagnostics to lighting compliance. Click any service for details.
Systematic diagnosis using OEM scan tools, digital multimeters, breakout boxes, and oscilloscopes. Fault codes, live data, active tests, wiring circuit testing, CAN bus analysis, voltage drop testing, and parasitic draw testing.
Common Electrical Problems
Parasitic Battery Drain
Batteries go dead overnight. Module not sleeping, aftermarket accessory wired incorrectly, relay stuck closed, or corroded switch.
Intermittent No-Start
Starts fine most of the time but occasionally won't crank. Corroded terminals, failing solenoid, high-resistance connections.
Multiple Fault Codes at Once
Engine, transmission, ABS, and cluster all show codes simultaneously — almost always a CAN bus or power/ground issue.
Phantom Warning Lights
Check engine, ABS, or other lights that illuminate intermittently. Connector corrosion, wiring chafing, or intermittent sensor connections.
Charging System Failure
Alternator not charging, overcharging, or intermittent. Can be alternator, voltage regulator, wiring, or battery bank issue.
Trailer Interface Problems
Lights work on tractor but not trailer, or trailer ABS faults with certain tractors. Connector corrosion or pin damage.
Electrical Repair Cost Guide
| Service | Cost Range |
|---|---|
| Simple Electrical Repair | $200–$500 |
| Alternator Replacement | $500–$1,500 |
| Starter Replacement | $400–$1,200 |
| Battery Bank Service | $300–$1,000+ |
| CAN Bus Diagnosis | $300–$800+ |
| Module Replacement & Programming | $500–$3,000+ |
| Complete Lighting Repair | $200–$1,000 |
| Wiring Harness Repair | $300–$2,000+ |
Written estimates provided before any work begins. All repairs backed by 3-year, 36,000-mile warranty.
OEM Diagnostic Platforms
Systematic Troubleshooting
Electrical problems are the most misdiagnosed category in commercial truck repair because symptoms can originate from dozens of potential sources. Our systematic approach — trace circuits, measure signals, analyze data — identifies the root cause before any parts are replaced.
Listen & Understand
Symptoms, when it happens, what changed, fault history.
OEM Diagnostic Scan
Full module scan, live data, active tests across all systems.
Circuit-Level Testing
Voltage drop, parasitic draw, CAN bus signal analysis.
Root Cause Identification
Specific fault identified with repair options, cost, and timeline.
Targeted Repair
Fix the actual cause — not replace parts hoping to solve it.
Verify & Document
Post-repair testing, road test, system verification.
Built for Heavy Duty
CTR's facility on Armentrout Drive has the diagnostic equipment and bay space for complete electrical system service on all commercial truck platforms. OEM-level tools for every major manufacturer. Directly off I-85 at Exit 58.
Fleet Electrical Support
For fleets dealing with recurring electrical issues across multiple units, CTR provides fleet-level diagnosis and can identify systemic patterns that save time and money.
(704) 786-0132
Electrical Repair Near You
CTR Heavy Duty — Concord
Directly off Interstate 85 at Exit 58. Easy truck access.
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