Won't you have any dough contact where you should not in the wear cable of wear and why does the lucecita turn off?
Sometimes it passes and the \ "mechanics of tó the life \" find the solution to cut the cable and hala! Run, which will already sound to iron when the pills are spent again!
Being a little more rational in this sense, the only thing I can tell you is that you check the level of the brake fluid, and that you check the status of the witnesses of wear in the pills, it is not going to be that you have a peeled cable or the witness is playing where it should not.
All the best.