,.,.,. 90V8Q braking on ice with ABS ,.,.,.,.

[Urmet Tamberg <urmet@novobcs.ee>]

hi folks!

do you know what can cause the following problem when braking with ABS
turned on
on ice or snow (or just on slippery road):

braking pedal goes almost to the floor and i feel no pulsation (like on
other cars when ABS is engaged),
back left wheel blocks, other three wheels do not brake at all (not even a
bit),
and what's worst of all - when i release the brake pedal, it would not come
up 
for about 2 seconds and the back wheel is being blocked (can throw the car
into a spin)

interesting thing is that when i turn ABS off, the braking abilities are
normal like they
supposed to be on a car without ABS.

now, if one can blame bad ABS sensors for it, perhaps it can cause
miss-calculations also 
for computer controlled central differential clutch?

anybody ... Elliot, Steve ... somebody ...?

Any hint or advice is greatly appreciated!!!

Urmet
90 V8Q