708-500-5281 
Electrical problems can shut a truck down without warning. West 66 provides complete electrical diagnostics and repair for heavy-duty trucks using professional diagnostic tools and OEM-level scan equipment. From warning lights and ABS faults to no-start issues, we identify the real cause and fix it correctly.
Electrical Diagnostics & Repair
Check Engine Lights Diagnostics
Today’s diesel engines depend on sensors, modules, and onboard systems to run properly. When a check engine light comes on, our technicians use advanced scan tools to read fault codes, test key components, and find the actual problem instead of simply clearing the code.
ABS Electrical Diagnostics
ABS faults can affect braking performance, warning lights, and DOT compliance. We diagnose and repair truck and trailer ABS electrical issues with the accuracy needed to restore safe, dependable operation.
Get Back on the Road Faster
Trusted electrical repairs and heavy-duty maintenance that help keep you safe, compliant, and on schedule.
Battery & Charging System Service
Weak batteries or failing charging components can create starting problems, warning lights, and inconsistent performance. We test, repair, and replace major battery and charging system components to keep your truck reliable.
Short Circuit & Wiring Repair
Electrical shorts, damaged wiring, and bad connections can be difficult to trace. Our team uses precise testing to locate the source of the problem and repair it the right way.
How the Process Works
From the first diagnostic check to the final verification, we follow a clear process designed to reduce downtime and get your truck or trailer back in service fast.
Process steps
- Initial electrical inspection and assessment
- Clear recommendations and work approval
- Professional diagnostics and repair
- Final quality and system check
- Ready for pickup and back on the road
Why choose West 66
Advanced diagnostic tools
Skilled at tracking down hard-to-find issues
Clean, reliable wiring repairs—no patch jobs
Certified heavy-duty diesel technicians
Frequently asked questions
Electrical diagnostics can help identify check engine faults, ABS issues, charging problems, battery failures, sensor faults, wiring damage, short circuits, and other system problems. Accurate testing helps pinpoint the real issue so repairs solve the cause instead of chasing symptoms.
OEM-level scanning gives technicians deeper access to fault codes, live data, and system information that generic tools can miss. That means more accurate diagnosis, faster troubleshooting, and better repair decisions, especially on modern heavy-duty trucks with complex electronic systems and controls.
A check engine light can be triggered by sensor failures, wiring problems, emissions-related faults, charging issues, module communication errors, or engine performance problems. The light does not identify the exact cause by itself, which is why proper diagnostic testing matters before repairs begin.
Yes. Electrical faults can affect ABS function, warning lights, lighting systems, and other safety-related components that matter during inspections. If those systems are not operating correctly, the truck or trailer may face compliance issues, added downtime, and a higher risk of failure.
Common signs include hard starting, dim lights, repeated dead batteries, warning lights, voltage-related fault codes, or inconsistent electrical performance. If the truck struggles to start or electrical issues keep returning, the battery and charging system should be tested as soon as possible.
Testimonials What Our Customers Say
Contact Us
Have a question or need a quick quote? Send your truck or trailer make, model, year, and a description of the issue, and we’ll get back to you as soon as possible.
Contact Information:
Phone:
708-500-5281
Email:
[email protected]
Location:
Address
198 W Laraway Rd, Joliet, IL 60436, United States
Opening Hours:
Mon – Fri:
7:00 AM – 5:00 PM
Saturday:
7:00 AM – 12:00 PM
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