90 Astro "brake" dummy light stays on

Ok so I've had my front & rear brakes checked out which are both fine but my "brake" dummy light stays on I alreay tried to unplug the wire on the emergency brake switch with no luck, any other suggestions.

check your brake fluid level, and the low level switch

Tableman, I'll check them both tomorrow but where is this low level switch located ?

They are actually sensors within the Master Brake Cylinder