Bomb Warning removal

[rjandrew@post.cis.smu.edu (R Justin Andrews)]

Scott  McPherson posted on disconneting the warning for 
a bad bomb (low assist/low pressure warning) 
Well, I did the same by just pulling the connector off closest
to the firewall but I have a question reguarding safety
Does this switch/indicator tell me if my master cylinder
is going or gone? Will it tell you before you attempt to brake??
If so I may just replace the bomb and hook up the switch.
Also, has anyone had there master cylinder  go out without
any signs before hand (soft pedal, etc.) If so please respond.
Thanks,
Rich Andrews
rjandrew@post.cis.smu.edu