> 
> 
> Your turn signal works because there is a heating element built into the
> signal flasher. When the turnsignal is turned on, a connection is made to
> your lights via the flasher. Inside the flasher is a heating element which
> heats up a bi-metallic strip attached to a set of points. The bimetallic
> strip heats up causing the points to open, which shuts off the heating element.
> The bimetallic strip cools, causing the points to close and the process begins
> anew.
> 
> Ric
> 

Oh, that is most cool!  Just like blinking Christmas tree lights!  I've often
wondered why those old VWs blink so erratically...

(once again amazed by those crafty German engineers)
John