so the brake message that is generated from the sensor has to deal with continuity of the circuit. When the brake pad wears to the point that it contacts the sensor it breaks the connection. It is possible that you pinched a wire in the circuit. If I had a wiring diagram it would be easier to tell but you should be able to get a good continuity reading between the two leads on the plug for the car. If you cannot get one there then the circuit is broken upstream of the sensor. I would check that out first before diving into too much.