Electrical &
Wiring Repair
Trailer lighting failures, chassis wiring faults, alternator issues — Road Wrench diagnoses and repairs all heavy duty electrical systems on-site. Gilbert, Chandler, Mesa, Phoenix, Glendale, Goodyear, Avondale, Buckeye, Queen Creek, Eloy, and all surrounding areas.
On-Site Electrical Services
Trailer Lighting & ABS Systems
Running lights, brake lights, turn signals, and ABS fault diagnosis and repair for all trailer types.
Chassis & Cab Wiring Repair
Shorts, open circuits, and damaged harnesses traced and repaired on-site with professional wiring tools.
Alternator & Starter Service
Charging system diagnosis, alternator testing and replacement, and starter motor service for Class 8 trucks.
Battery Testing & Replacement
Commercial-grade battery load testing and replacement for 12V and 24V heavy duty truck systems.
Gladhand & Connector Repair
Trailer gladhands, 7-way connectors, and ABS pigtails repaired or replaced on location.
No-Start Electrical Diagnosis
Full electrical diagnosis for no-start conditions — from dead batteries to ECM power supply faults.
Electrical Diagnosis Where You Are
Electrical faults are notoriously hard to chase — and they don't get easier when you tow the truck to a shop. Road Wrench brings professional wiring tools and diagnostic equipment directly to your location, diagnosing faults in context.
- Professional wiring and diagnostic tools on board
- Trailer lighting DOT compliance
- ABS fault diagnosis and repair
- Charging system testing
- 24/7 dispatch — Gilbert, Chandler, Mesa, Phoenix, Glendale, Goodyear, Avondale, Buckeye, Queen Creek, Eloy & Phoenix Metro