Soft Brakes in 89 100 FWD?

[njomele hong <njomhong@yahoo.com>]

Folks,

Wagon was in the shop for brake inspection and low
beam switch repair, after I left brakes were very soft
in stop and go trip home (seven miles).  I had to pull
over and wait for traffic to free up.  The mechanic
says my master cylinder is pooped out and wants to
look at it again and complete the lo beam work.  What
do you think could be the problem so I can ask him to
do a thorough check.  Previous check consisted of " I
drove it around the block and they seemed OK."  Bomb
other?

Thanks 
__________________________________________________
Do You Yahoo!?
Bid and sell for free at http://auctions.yahoo.com