About 3 months ago the brake light on my 2001 Punto started to
intermittently light up, briefly (1-2 seconds), either when going round
lengthy corners, or when braking sharply.  I had the car serviced, asked
for the brakes to be looked at - the mechanic found nothing wrong and
topped up the brake fluid.  However the problem with the light did not go
away and may have been worsened by a journey down a three-mile 1-in-4
hill, riding my brakes for most of the way, which resulted in the light
appearing again although it went off shortly after resuming driving on the
flat. The problem with the light kept recurring, so took it to the garage
again, had the whole brake system checked again, and eventually the
mechanic found a leaky clutch slave, which he replaced.  HOwever, the
brake light is still lighting up intermittently (- it appears to happen
more frequently in hot weather)- the brake fluid is not low, the brakes
have been checked several times, the one leak discovered has been fixed.
Has anyone any ideas what could be causing this -are there any other
possible leaks? is it possibly a falty sensor and if so how could i
identify any problems with the sensors which cause the light to flash on?