Got a break wear light

[Mark_T]

Um I don't think you're correct there. The nub of the sensor gets worn through when the pads wear down enough to expose it. I mean, yes, the rotor does wear through the sensor, but only when the pad is sufficiently thin to allow this to happen. The sensor is there to monitor brake pad wear, not rotor wear. Your rotors could be paper thin and that alone will not cause the indicator light to go on.

In this case it sounds like it might be just a bad connection. Check the connectors to the sensors to see if one has worked loose or fallen off. Could also be a defective sensor, which you can determine by checking for continuity through the sensor with your multimeter. Also check and see if the section of wire between the sensors has been pinched or broken.



Checking for continuity (this one is good):

[KRAM36]

Originally Posted by Mark_T

Um I don't think you're correct there. The nub of the sensor gets worn through when the pads wear down enough to expose it. I mean, yes, the rotor does cut the sensor, but only when the pad is sufficiently thin to allow this to happen.

In this case it sounds like it might be just a bad connection. Check the connectors to the sensors to see if one has worked loose or fallen off. Could also be a defective sensor, which you can determine by checking for continuity through the sensor with your multimeter. Also check and see if the section of wire between the sensors has been pinched or broken.

Thickness of the pads have nothing to do with it in this case. It's the rotors being so worn they cut through the wire.

[Timco]

Originally Posted by KRAM36

Thickness of the pads have nothing to do with it. It's the rotors being so worn they cut through the wire.

The sensor tip is inserted into the pad. When the pad wears enough the wire makes contact with the rotor once it's exposed through the worn pad. This is the only way they trip unless one is unplugged or damaged.