Over the weekend I was driving my Gn and when I got home I let run to cool down and got I noticed by brake light where on . I got back in and pushed on the pedal and they went off. Then I started it back up again and the brake lights stayed on and this time I pushed the pedal and it would come back up also the brake idiot light came on every time I push the pedal . I checked the brake fluid it was OK . I was wondering do you think it might be the powermaster? Please Help