I recently purchased a 98 GTS and decided to start buying parts for some routine maitenance. I will be changing the rear differential oil, replacing the brake pads, changing the brake fluid, and replacing all the tires. My question is, I purchased some "OE" pads for the car and the front pads have sensor wires moulded into the pad material near the backing plate. I have a 98' factory service manual and it's clear this was not used. Can somebody explain what the purpose of this wire is?