How to Check Continuity of Anti-Lock Brake Wires

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How to Remove an Anti-Lock Brake Sensor....5

Checking ABS wiring for continuity. Learn how to replace anti-lock brake sensors in this free video on car maintenance.

Part of the Video Series: How to Replace Anti-Lock Brake Sensors
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Video Transcript

In this clip, we're going to talk about the proper way to remove and replace a rear wheel anti-lock brake sensor on a late model Ford Explorer. In this step, we're going to talk about the proper way to check the continuity of the wiring from your anti-lock computer all the way back to the sensor. What I'm going to do is, I have my heavy duty test light here and just because the cable only comes in a certain length, I have hooked some jumper cables to the positive and negative side of my battery and ran them back here so I can hook up to them and get a good ground and a good positive. You're going to want to make sure not to touch your cables together or touch them to anything that'll conduct electricity while you?re doing this task. What I have here, is my anti-lock brake sensor connector and it has a hot wire and a ground wire. What I'm going to do is go ahead and check continuity. Right there my light lit up, that means that the positive side of the circuit is fine. What I'm going to do now, is take and switch my connectors around. I'm going to take my test light lead and hook it to the other side of my jumper cable and check the other side of the circuit. If my light, lights up, that means both sides of the circuit are good and that indicates that my sensor is bad. Right under here, switch my connector. Grab a hold and test the other side of the circuit. As you can see, the light, lights up. Which indicates that the negative side of the circuit is good. That narrows the system down to it being a failure with the sensor. That's the proper way to diagnose the wiring and your failed rear wheel anti-lock brake sensor.

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