ABS SYSTEM

ABS System Parts For Peterbilt Trucks

The anti-lock braking system is a critical safety component on every Peterbilt truck, preventing wheel lockup during hard braking and helping the driver maintain steering control. ABS failures don't just trigger dash warnings — they can lead to DOT violations and put your CDL at risk. We carry ABS sensors, modulators, ECUs, and wiring harnesses to get your braking system back to full functionality.

Frequently asked questions about ABS system parts

What causes the ABS light to come on in my Peterbilt?

The most common cause is a faulty wheel speed sensor or a damaged sensor wiring harness. Corrosion at the sensor connector, a cracked tone ring, or a failing ABS modulator can also trigger the warning. Pulling the fault codes with a diagnostic tool will pinpoint the exact issue.

Can I still drive with the ABS light on?

The truck will still brake, but without ABS protection the wheels can lock up during hard stops, which increases stopping distances and reduces vehicle control. An active ABS fault is also a violation during DOT inspections and can result in an out-of-service order depending on severity.

How do I test an ABS wheel speed sensor?

You can use a multimeter to check sensor resistance, which should typically fall between 900 and 2,000 ohms depending on the manufacturer. You can also check for AC voltage output by spinning the wheel while the sensor is connected. If readings are out of spec or inconsistent, replace the sensor.

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