Truck Diagnostics & Electrical Repair in Ottawa, ON

Heavy-Duty Diagnostic And Electrical Repair in Ottawa, ON

Whelan Truck Repair provides expert diagnostics and electrical repairs for modern diesel trucks, covering everything from ECMs and wiring harnesses to sensors and starter motors. Using advanced scan tools, we identify and resolve no-start issues, power loss, and system faults quickly and accurately. Our services include battery testing, OBD-II diagnostics, lighting checks, and wiring continuity assessments.

Signs You Need Electrical Repair or Diagnostics:

• Engine cranks but won’t start or stalls randomly
• Check engine light or system fault codes showing
• Inconsistent lighting, horn, or dashboard gauges
• Dead batteries, even after replacements
• Electrical shorts or blown fuses that return frequently

What Makes Whelan Truck Repair Different?

Our electrical diagnostics go far beyond a quick code scan. At Whelan Truck Repair, we use dealer-level diagnostic tools to pinpoint faults, interpret data, and verify system health.

• Full ECM, sensor, and system diagnostics with advanced tools
• Trusted by Ottawa-area fleets for precision and reliability

Contact Us About Truck Electrical Repair Now: Call 613-831-7677!

If your truck is showing electrical issues or system warnings, don’t wait. Call Whelan Truck Repair at 613-831-7677 for professional diagnostic and electrical repair services in Ottawa. We'll locate the issue and get your truck safely back in service.

FAQs

What Areas Do You Serve For Electrical Diagnostics?

As well as Ottawa, ON, we proudly serve:

Gatineau, QC; Kanata, ON; Orléans, ON; Carleton Place, ON; Rockland, ON; Arnprior, ON; Smiths Falls, ON

What is included in truck diagnostics?

Diagnostics typically include reading and interpreting fault codes, testing sensor outputs, checking wiring integrity, inspecting battery voltage and alternator output, and evaluating control module performance using scan tools and voltmeters.

Can a truck run with a bad alternator?

Only temporarily. A bad alternator won’t charge the battery, so your truck will eventually lose all power—even mid-drive. Immediate repair is essential to avoid a breakdown and potential electrical system damage.

How Can I Get Diagnostics and Electrical Repair?

To book diagnostic or electrical repair services, call Whelan Truck Repair at 613-831-7677. We’ll run a full system check and repair what’s needed to keep your truck compliant, safe, and reliable.