Pentosin flush

[ekellock@juno.com]

Picked up on recent posts about flushing Pentosin and fixing warnings. 
Here's my experience...

Wasn't sure which "return" line to unhook.  Looked in Bentley, surmised
from comment about jacking car up and diagrams in Bentley that the hose
from the pump to the bomb was the one.  I disconnected that one and got
about two drips. I realize now that I had not opened up the cap on the
fluid reservoir so there was no place for air to get in the other side,
but I expected to have more of a mess.  Reconnected it and used a turkey
baster to evacuate the reservoir.  Cleaned the screen and refilled with
new fluid.  Level was halfway between min and max before operation,
filled to max, drove and checked, still at max.  Still get warning.

Questions:

Should I have had fluid running out of the hose I disconnected?
Did I disconnect the right hose?
Which warning are we talking about here?
The warning I'm talking about is the brake pad wear warning (O) in the
AutoCheck display.  The owner's manual indicates this warning is also
indicative of hydraulic pressure problems.  The red rectangular BRAKE
warning flashes when I hit the pedal once quickly, will stay on if I pump
the pedal half a dozen times with engine at idle, a few more with engine
at higher rpm.  One or two pumps is all it takes to get a hard pedal
after engine shutdown.

TIA

Ed Kellock ................... Greenville, SC  USA
91 200qw ........................ 87 Coupe GT