ABS Diagnostics & Repair
A lit ABS lamp on the trailer indicates a fault in the anti-lock system. Diagnostics trace the issue to sensors, wiring, modulators or power supply.
- AvailabilityCalls and messages 24/7
- WhereRoadside, yard or jobsite
- CategoryTrailer Repair
- On-site repairWhere feasible and safe
About abs diagnostics & repair.
A lit ABS lamp on the trailer indicates a fault in the anti-lock system. Diagnostics trace the issue to sensors, wiring, modulators or power supply.
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 Trailer Repair.
When you might need it.
Any of these is a good reason to call and describe what the unit is doing.
ABS warning lamp on
Lamp that stays on after start
Intermittent ABS faults
Wheel-speed signal errors
What the service involves.
Reading ABS fault codes
Checking sensors, tone rings and wiring
Testing power and ground
Repairing or replacing faulty parts
Causes and good habits.
These are possibilities, not a diagnosis. The only way to know is to test the unit.
Possible causes
- Wheel-speed sensor faults
- Damaged wiring, pigtails or connectors
- Power or ground problems
Practical tips
- Check the ABS lamp during each pre-trip
- Inspect the pigtail for cuts and corrosion
What to expect.
Some ABS faults relate to the tractor connection, so both units may need checking.
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.
ABS Sensor Replacement
Wheel-speed sensors sit near the hub and are exposed to dirt and damage.
Trailer Brake Repair
Trailer brakes take a lot of abuse.
Trailer Electrical Repair
Trailer electrical faults affect lighting, ABS and auxiliary systems.
Trailer Lights & Wiring
Trailer lighting is required for safe, legal operation.
ABS Diagnostics & Repair by area.
Choose your community for local information.
Frequently asked questions.
Why is my trailer ABS light on?
Common causes include sensor faults, damaged wiring or power supply problems. Diagnosis finds which.
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.