Your brake light ignition switch should be replaced. It works your brake lights and ignition switch, so you do need it. It only costs about $7 dollars.
Your brake light switch under your pedal is brobaly stuck
check the switch at the break peddle
A 1993 Mercury Cougar takes ( DOT 3 brake fliud )
just replace it this switch might also be the boo switch that sends the signal to the computer
Remove the tire and wheel from your 1994 Mercury Cougar. Remove the brake spring and brake caliper. The brake shoes will come off.
The brake and clutch fluid systems are supplied by the brake fluid reservoir ( according to the 2001 Mercury Cougar Owner Guide )
On a 2000 Mercury Cougar : The brake fluid reservoir is also the clutch fluid reservoir
Remove the tire and wheel from your 1999 Mercury Cougar. Remove the brake spring and the break caliper. The brake pads will come off. Reverse the process to install the new brake pads.
According to the 1996 Mercury Cougar Owner Guide : ( DOT 3 brake fluid , meeting Ford specification ESA-M6C25-A )
Yes
Blown fuse
try fuse 24