My parking brake light on the dashboard doesn't come on. The brake itself engages and disengages, just the light doesn't come on. I bought it last week, 07 laredo, and just yesterday I was fiddling with it. I pulled up on the brake and the light on the dash flickered a few times then didn't stay on, even though the brake was on. So I put it on and off a few times with no light at all, not even a flicker. Is it possibly a bad sensor? I don't think its the bulb due to it flickering on and off. Give me some ideas folks!!