One for the Brains Trust

[quk@sievers.com (Phil Payne)]

Here's a good one.  Why does engaging the differential lock on my car 
automatically disable ABS?
 
On the TORSENs, the only lockable differential is the rear one.  This 
effectively turns the rear into a solid axle - leaving the centre TORSEN and 
the front unlocked.
 
I could understand ABS being disabled if it worked on a wheel-by-wheel basis.  
But on the 1988 MB there is only one channel for the back axle.

Why should it make any different to the ABS if the diff is locked?
 
--
 Phil Payne
 phil@sievers.com
 Committee Member, UK Audi [ur-]quattro Owners Club