I noticed today my 3rd brake light was on when I got out of the car. I backed up to my garage door and thru a little trial and error I find my brake lights are being energized by the running lights. if I turn the lights completely off, the brake lights work fine. If I turn any ext. lights on the brake lights come on and do not change in brightness, but my 3rd light does flash from an after market flasher unit when I push the brake pedal. I believe it is water getting in some where as we had wet snow last night and today has been damp and rainy.