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Subject:Re: Load screeching sound from leaving lights on?
From:Alan Bosch
Date:Fri, 19 Feb 1999 09:10:19 -0600

Sounds like your alternator belt slipping.  When the belt is relatively
cold - not warmed from the friction of movement - it shrinks a bit and will
not seat snuggly in the pulleys.  The load on the alternator due to a
partially drained battery is probably sufficient enough to cause the cool -
relatively - belt to slip, thus causing the screech you hear.

Alan Bosch
Phred ('88 Wolfsburg)