86 5ktq brake warning light

[Nate Brown <ntb@cisunix.unh.edu>]

Hi,

On my way to work this morning I noticed that every time I would take a
turn or drive up/down a hill, my brake warning light (the red triangle
with brake written across it and three beeps) would come on and stay
flashing until I flattened out or came out of the turn.  Anyone out there
know what could be causing this?  The brake fluid level is fine so I am
not too sure where to start.  I know in the past when the light came on
all I would have to do is add more fluid and it would not come on anymore.
I haven't had any brake work in months.  The last was two new calipers and
roters on the rear...I bled them properly afterwards.  There has been no
change in pedal travel or firmness.  Could this just be a faulty sensor on
the resevior cap?  I was planning on flushing the fluid out in the next
couple of weeks and filling up with DOT 4.  The fluid in there now is not
more than a year old DOT 3.  I checked all the lines, bomb, and anywhere
else I could get to and I am not leaking fluid.  Your guess is as good as
mine.

TIA,
Nate Brown

86 5kstq 190+K