Electrical Troubleshooting
Electrical faults can be maddening. Troubleshooting traces power, ground and signal faults across the truck or trailer.
- AvailabilityCalls and messages 24/7
- WhereRoadside, yard or jobsite
- CategoryRoadside & Emergency Assistance
- On-site repairWhere feasible and safe
About electrical troubleshooting.
Electrical faults can be maddening. Troubleshooting traces power, ground and signal faults across the truck or trailer.
A mobile mechanic can look at the unit where it stands, whether that is the roadside, a yard or a jobsite. That can avoid a tow and shorten downtime when the fault is suited to on-site work.
Part of Roadside & Emergency Assistance.
When you might need it.
Any of these is a good reason to call and describe what the unit is doing.
Dead circuits
Blown fuses
Intermittent faults
Lights or gauges misbehaving
What the service involves.
Circuit testing
Checking fuses, relays and grounds
Locating damaged wiring
Repair or recommendation
Causes and good habits.
These are possibilities, not a diagnosis. The only way to know is to test the unit.
Possible causes
- Blown fuses and failed relays
- Poor grounds and corrosion
- Damaged wiring
Practical tips
- Note which circuits fail and when
- Check fuses only as a first step, not a fix
What to expect.
Intermittent faults can take time to isolate.
On-site repair depends on the fault, parts, vehicle condition, safety and service feasibility.
(437) 601-8551Before you call
- Exact location, and direction of travel on a highway
- Truck or trailer type, make and year if known
- What happened and what warnings you see
- Whether the unit is somewhere safe
- A number we can call back
From the first call to the fix.
Call or message
Tell us where the unit is.
Describe the fault
Symptoms, lights, noises, leaks.
Agree the plan
Feasibility and dispatch, discussed honestly.
Diagnose and repair
On site where it is possible and safe.
Services that often go together.
Electrical Wiring Repair
Intermittent faults and dead circuits are often wiring problems: chafed harnesses, corroded connectors or loose grounds.
Lights & Wiring Repair
Working lights are a safety and compliance requirement.
Trailer Electrical Repair
Trailer electrical faults affect lighting, ABS and auxiliary systems.
Battery Testing & Replacement
Heavy-duty batteries wear out, especially in Canadian winters.
Frequently asked questions.
Can electrical faults be traced on site?
Often, using test equipment, though some are hard to isolate.
How do I request this service?
Call (437) 601-8551 or message us on WhatsApp with your location and the issue. For non-urgent work, use the contact form.
Can every repair be done on site?
No. It depends on the fault, parts, vehicle condition, safety and feasibility.
Stranded on the Road? Let's Talk.
Tell us where your truck or trailer is located and what happened. Contact Fellows to discuss mobile repair options and next steps.
(437) 601-8551Have ready: exact location, truck or trailer type, what happened or what warnings you see, whether the unit is somewhere safe, and a callback number. Timing, dispatch and on-site repair depend on location, availability, the fault, parts and safety.