Break light comes on some times disconnted master cilnder switch and it still comes on

For some reason these vehicles you need to bleed brakes several times, had same problem, so air hangs up in lines somewhere it apears. When you say brakes sticks, describe it better, locked up, or dragging on rotors?
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ABS lights are usually triggered by a sensor, not a master cylinder.

Have someone check the switch on the master cylinder, sometimes it gets blocked up with 'gunk'. May need to replace it

Could be the switch for the parking brake, or the brake fluid level in the master cylinder.

If you look underneath your bug on the driver's side where the master cylinder is you will see 2 electrical plugs plugged into the master cylinder. Each plug has 3 wires. Disconnect both from the master cylinder and see if the brake lights go out. If so, then replace both brake light switches on the master cylinder. You can disconnect one at a time and see if the lights go out that way. Which ever one that causes the lights to go out when disconnected is the bad switch. The light circuit will work with only one switch connected, so if neccessary you can get by on one switch.

brake switch bad, system needs bled, rear brake circuit probably has air in fluid, fluid is no doubt contaminated, nobody addresses this maintainance problem, bleed entire brake system, replace all fluid w/ new. if fluid in the master cylinder is black, seals are bad, some brake systems have a pump as part of master cylinder, these pumps run off fuses , 25amp, etc., check what system you have. is your fluid level correct ? the switch I refer to is @ proportioning valve below master cylinder @ frame, see abs brakes use this valve to prevent skidding, rear brakes must come on first, before front brakes. if valve is not in balance a hard brake pedal occurs, as with low fluid levels. does your brake light come on ? @ dash. have a brake shop bleed your system, if there's a problem they'll find it for you, let them do it, don't wast your time.

Here's a link on how to bleed.http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0996b43f80380272

has to be your brake light switch unusual though normally wired to ignition circuit but saabs normally have side lights wired to come on when ignition is turned on due to swedish laws
try brake light switch at foot pedal or maybe on master cylinder just remove a wire one side of switch if they go out you have your problem

check for brake lights if light don't work check the 2 wires going to brake light switch behind brake pedal the wires do break

if you push it in and no pettle check fluid if has fulid could be two things a slave cilnder or master cilnder