At 01:18 PM 11/6/2008, The Westy man wrote:
>Excellent explanation, David.  I will file it.  Let me ask though;
>when I have that 100k resistor across the legs, and it still blinks,
>I ground the resistor or the leg, or its the same thing.

Same thing.

>Where would ground be for this sensor, when I have to clean it?

It ties into the licence-plate light ground, which then comes to
earth on the wall beneath the ignition coil.  Unless it's unplugged
or busted wire, not too likely, since it will work fine with a
seriously crappy ground.  But you can test by sticking a pin into the
back of the ground side of the plug and grounding that.  Nothing will
smoke if you get the wrong side of the plug.

--
David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage," '85 GL "Poor Relation"