Carol Stream, IL · Mon–Fri, 9am–4:30pm
(630) 520-0103 service@bigrigfixer.com
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Big Rig Fixer technician performing abs diagnostics

Advanced ABS Diagnostics

Don'T Let an ABS Light Cause Unnecessary Headaches

Truck and trailer ABS fault diagnosis in Carol Stream. Bring the warning history so we can investigate the cause.

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Expert ABS Diagnostics & Repair

We investigate ABS warnings using fault information, system checks, and the equipment’s service requirements. The goal is to identify the cause of the warning and explain the repair findings.
Technician using diagnostic tool on truck ABS system

Accurate ABS Troubleshooting

We investigate ABS warnings using fault information, system checks, and the equipment’s service requirements. The goal is to identify the cause of the warning and explain the repair findings.

ABS Diagnostics—What's Included

  • OEM-Level Tools

    Bendix, WABCO/Meritor, and trailer ABS coverage for accurate fault interpretation.

  • Sensor & Tone Ring Checks

    Verify gaps, damage, and signal quality to resolve intermittent wheel-speed faults.

  • Harness & Connector Repair

    Find shorts, opens, and corrosion; replace or re-terminate with sealed connectors.

  • Module Testing & Calibration

    Power/ground validation, config review, and post-repair calibrations where applicable.

  • Road Test & Data Logs

    Confirm repairs under load with live data to ensure stable braking performance.

  • Fast Turnaround

    Efficient diagnostics minimize downtime and keep your schedule on track.

An ABS Lamp Is a Starting Point

Record whether the ABS warning belongs to the tractor, trailer, or both, and whether it remains on or appears intermittently. Report braking-performance concerns separately. A lamp does not establish that a wheel-speed sensor needs replacement; power, wiring, connections, signal quality, and other system components may need investigation.

Do not erase fault information simply to extinguish the lamp. Bring the exact codes if available and tell us about recent hub, brake, axle, or wiring work. If stopping ability is reduced or another immediate safety concern is present, stop safely and arrange assessment before moving the equipment.

  • Warning location and exact code
  • Conditions when the lamp appears
  • Recent brake or wheel-end work
Air Brake Repair

Frequently Asked Questions

What Does an ABS Warning Mean?
It indicates that the anti-lock braking system has information or a fault requiring attention. Record the exact warning and follow the vehicle manual. Report any reduction in braking performance separately and stop safely when braking is compromised.
Does an ABS Code Mean a Sensor Needs Replacement?
Not necessarily. The code, wiring, connections, power supply, sensor signal, and related components may need testing. Replacing a named part without confirming the cause can leave the fault unresolved.
What Should I Bring for an Intermittent Fault?
Bring the warning or code, tractor and trailer identification, the conditions when it appears, and records of recent brake, axle, or electrical work.

Get Your ABS System Checked

Schedule your ABS diagnostic service today to ensure safe, compliant braking performance for your trucks and trailers.

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