Parking brake light flashes nonstop?

On my 91 S10 Blazer 4x4, my parking brake light in the dashboard constantly is flashing. When I put on the parking brake, it goes on and stays on (no flashing). Then when I take it off, same flashing light. What seems to be the problem? P.S. There has been some minor front end damage. Is it a bad sensor or something?

Look around under the master cylinder for a block with several hyd. lines to it and a wire connector. Unhook the connector and see if light goes out. May have a leak somewhere that is setting the warning light due to uneven pressures?