Ok so i am driving around town this morning and out of no where my brake light pops on and starts chiming. So i pull over check the master cylinder for fluid and...... its full so i check under the car around the brake line area for a leak, its all nice and dry, then i get back in and continue on with the light on and chiming and my brakes are working perfectly? What could be causing this? is this a sign of a bad m/c? I have no clue.

is the parking brake pedal pulled the entire way up...you may have moved it while driving and set it off??

look for sepage on the Booster for signs of a bad MC...the Wheel Cylinders also can leak....

the other thing is to clean the connector on the MC res and look for corosion