Heavy-duty electrical faults can cause no-starts, dead batteries, intermittent warnings and communication problems across multiple truck systems. My Truck Repair Shop provides truck electrical diagnostics and supported repairs at our Conway, SC shop, serving commercial vehicles from Conway and the Myrtle Beach area.
Electrical symptoms we investigate
- No-crank, slow-crank and intermittent starting problems
- Dead or repeatedly discharged batteries
- Charging-system and low-voltage complaints
- Blown fuses, failed lights and accessory power loss
- Damaged wiring, connectors, terminals or grounds
- Intermittent warning lights and module fault codes
- Communication and data-network faults
- Trailer connector, lighting and power problems
- Thermo King APU charging and supported electrical concerns
Testing the circuit instead of guessing
Modern trucks can store many codes after a single voltage or communication event. Replacing the component named in a code may not solve a poor ground, damaged harness, loose terminal or unstable power supply. We start with the complaint and circuit, then test power, ground, voltage behavior, connections and relevant data before recommending parts.
Intermittent problems can require additional time because the failure may not be active when the truck arrives. Photos, videos, exact dash messages and the conditions under which the fault occurs help us reproduce and isolate it.
Starting, charging and battery service
A discharged battery may be the result of battery condition, charging output, cable resistance, poor connections, an electrical draw or repeated starting attempts caused by another fault. We inspect and test the related system so the repair addresses more than the immediate symptom. Battery replacement and supported charging-system repairs are available based on diagnosis and parts.
Wiring, lighting and module-related faults
Commercial trucks and trailers operate in vibration, moisture, heat and road contamination. Harness damage, corrosion and connector movement can create intermittent behavior that disappears while parked. We inspect accessible wiring and connectors and use circuit tests to narrow the source. Programming or module-related service may be performed when applicable to a confirmed repair; programming is not a substitute for repairing a physical power, ground or network problem.
Electrical faults that affect other systems
Electrical issues can trigger engine, transmission, ABS, aftertreatment, A/C, lighting and trailer complaints. If DEF, DPF, EGR or SCR faults are involved, see our aftertreatment diagnostics. For no-start and drivability concerns, see diesel truck repair.
What to provide before service
- Truck year, make and model
- Exact symptoms and whether they are constant or intermittent
- Fault codes, dashboard photos and videos
- Recent battery, alternator, starter, module or wiring work
- Any event that preceded the problem, such as a jump-start or water exposure
- Current truck location and whether it can be moved safely
Shop diagnostics in Conway, South Carolina
Electrical testing is usually more reliable in the shop, where the technician has stable working conditions and access to tools and parts. Our location is 3236 US-701 Hwy, Conway, SC 29526. We serve Myrtle Beach-area customers from this single Conway facility. Limited paid roadside diagnostics may be available, but we do not advertise 24/7 mobile electrical repair.
Truck electrical FAQs
Do you replace truck batteries?
Yes. We service batteries and related starting or charging concerns. Testing helps determine whether battery replacement alone is the correct repair.
Can you find an intermittent wiring problem?
We diagnose intermittent electrical faults, although they may require more time to reproduce. Detailed symptom information makes the process more efficient.
Do you work on trailer lights and connectors?
Yes. Trailer electrical and lighting diagnostics are available; bring tractor and trailer together when the source could be on either side.
Schedule truck electrical diagnosis
Call (708) 916-1268 Monday-Friday, 9:30 AM-5:30 PM, or use our contact page. My Truck Repair Shop is operated by AGB Group Inc.