Emergency brake light on 2000 Toyota Tundra

The emergency brake light stays on, although the emergency brake is off. s it possible that it could be low on brake fluid? If so, how do you check the brake fluid and if it is low, how do you fill it? Thanks

1 answer
Your tundra has a parking brake warning switch available at http://www.parts.com/ $29 to $69 depending on single or double cab.