Diagnostics & Electrical Repair in Fontana, CA

Are you experiencing flickering lights or a persistent check engine light in your diesel vehicle? You might need professional help. At OnSite Truck & Equipment Repair, we specialize in pinpointing and resolving these issues for diesel vehicles and fleets across Southern California.

Premier Diagnostics and Electrical System Services in Fontana and Beyond

At OnSite Truck & Equipment Repair, our team of certified technicians understands the complexities of diesel vehicles. Whether you're managing a single diesel truck or an entire fleet, our comprehensive diagnostics services are designed to identify the root cause of any electrical issue quickly. We utilize the latest tools and techniques to ensure accurate results, from troubleshooting a check engine light to complete electrical system overhauls.

Our services include but are not limited to:

  • Check Engine Light Diagnostics: We decode warning signals to pinpoint issues and prevent potential engine damage.
  • Complete Electrical System Repair and Maintenance: From lights repair to wiring harness corrections, we handle all electrical needs.
  • Preventive Maintenance: Regular checks and services to avoid unexpected breakdowns and costly repairs.

Servicing areas including Chino Hills, Claremont, Jurupa Valley, Palm Springs, Pomona, Riverside, and more, we ensure that help is never too far away.

Ready for Reliable Service? Call Us Today at (951) 588-8000

Don’t let electrical issues disrupt your operations or your travel. Contact OnSite Truck & Equipment Repair now for top-tier diagnostics and repair services. Our mobile units can reach you anywhere in Los Angeles County, Orange County, San Bernardino County, and the Inland Empire.

FAQs About Diesel Vehicle Diagnostics and Electrical System Repairs

What signs indicate I might need diagnostics for my diesel vehicle?

Common indicators include the check engine light turning on, dimming or flickering lights, and unusual battery behavior. These signs suggest an immediate need for a professional diagnostics check to avoid further complications.

How often should the electrical system in a diesel vehicle be checked?

We recommend a thorough inspection at least once a year. However, if you frequently drive in harsh conditions or depend heavily on your vehicle for work, more frequent checks might be necessary.

Which areas do you serve?

OnSite Truck & Equipment Repair covers all cities within Los Angeles County, Orange County, San Bernardino County, and the Inland Empire, including specific communities such as Chino Hills, City of Industry, Claremont, Jurupa Valley, Palm Springs, Pomona, and Riverside.

Need Immediate Assistance? Contact OnSite Truck & Equipment Repair!

For urgent diagnostics and electrical system repair needs, call us at (951) 588-8000. We're ready to assist you wherever you are, ensuring minimal downtime and maximum efficiency for your diesel vehicles.

What They're Saying About Us

See why our customers consider OnSite Truck & Equipment Repair the go-to repair shop in Fontana, CA and the surrounding areas!

Best truck repair in town!! Broke down on the side of the freeway - they sent a tech to me and he took my truck apart and had another technician bring him the part to replace! Quick, easy, efficient and super nice. Thanks Kacie, Maui and Vanessa!!

Freddy Daniel Miranda Silva

Very professional and great work done. Definitely have a returning customer with me and my trucks

Christopher Van Egmond

It was a privilege having your tech Payne work on our company equipment. He goes above and beyond every time and has excellent customer service skills. I look forward to Payne handling our account more regularly.

Jeff Brown

I took my personal truck to Onsite to get new tires. Working with Kacie she is professional. The Onsite team did a great job on the installation.

Joshua Shafor

My dad went in to get his truck fixed and this place did not disappoint. Adael was very friendly, walked him through the whole process and all associated costs. As a Spanish speaker, it’s nice to know people still care and take the time to help instead of trying to make a quick dollar. His truck was ready to go within the timeline he was given & he left a happy customer. Thank you!

Jazmine Vazquez

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 4:00pm.

Our Hours

Monday - Friday
7:00 AM to 4:00 PM

Saturday - Sunday
Appointments Only

24/7 Roadside assistance

Speak to a Service Advisor Now!