Alternator Replacement
If the alternator stops charging, batteries drain and electrical systems fail. Alternator replacement restores charging so batteries are not repeatedly flattened.
- AvailabilityCalls and messages 24/7
- WhereRoadside, yard or jobsite
- CategoryHeavy-Duty Truck Repair
- On-site repairWhere feasible and safe
About alternator replacement.
If the alternator stops charging, batteries drain and electrical systems fail. Alternator replacement restores charging so batteries are not repeatedly flattened.
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 Heavy-Duty Truck Repair.
When you might need it.
Any of these is a good reason to call and describe what the unit is doing.
Battery warning light or low voltage readings
Dim lights or electronics resetting
Batteries repeatedly going flat
Whining noise or a slipping belt
What the service involves.
Charging system test
Checking belts, tensioners, cables and batteries
Replacing the alternator when confirmed
Rechecking charging output
Causes and good habits.
These are possibilities, not a diagnosis. The only way to know is to test the unit.
Possible causes
- Worn brushes or bearings
- Loose or slipping drive belt
- Damaged wiring or poor grounds
Practical tips
- Watch battery voltage on the dash
- Replace worn belts before they slip
What to expect.
Batteries damaged by a failed alternator may also need testing or replacement.
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.
Battery Testing & Replacement
Heavy-duty batteries wear out, especially in Canadian winters.
Starter Replacement
A failed starter leaves a truck stuck even when the batteries are good.
Electrical Wiring Repair
Intermittent faults and dead circuits are often wiring problems: chafed harnesses, corroded connectors or loose grounds.
Starter & Alternator Repair
Starting and charging problems often arrive together.
Frequently asked questions.
Can I drive after the charging light comes on?
Only briefly, and not far. The truck runs on battery reserve and can stall. Call before the batteries die.
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.