Rick's Free Auto Repair Advice

Posts Tagged: antilock brakes

Test an ABS sensor

How to test a wheel speed sensor If the ABS light is on and you suspect a bad sensor, here’s how you test an ABS sensor ABS sensors are divided into two categories: active and passive. Passive sensors generate an AC voltage that you can test with a digital multimeter. An active sensor produces a digital square wave and you can only test those with a scope. This article describes how to test an ABS sensor of the passive type. Disconnect the sensor at the wheel and use a digital … Read More


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