The 12 volt power for the auxiliary air regulator requires the engine to
be actually running. It is feed from the same supply that powers the fuel
pump which also powers the injectors.

The switch connection will show ~5 volts. One wire goes to the ECU and
other one completes the circuit to the chassis. Bad grounds will also
effect the reading.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Eastman, Cecil @ ELM
Sent: Tuesday, October 30, 2007 4:36 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Just in Case: where to get a wiring harness

Greetings,

New dilemma (new to me, anyway).  When last we talked, I'd discovered that
my brand new Throttle Valve Switch had been murdered.  The prime suspect:
the electrical connection, believed to be the aux air regulator wire
mis-connected.  So to test this hypothesis I got out the multi-meter.  I
fully expected a 12V reading (ignition on, just as directed).  Instead, I
got zilch.  As in zero.  When I moved the tester's contacts around within
the plug, the most I got was an occasional " - " which let me know that
the
tester was prepared to register something.  But...nothing.

This says to me that I probably have a bad wire.  From the Bentley's, the
other end of this wire goes directly to the ECU, as it's part of that
morass
of spaghetti known as the Wiring Harness.

So can you repair just one wire in this harness?  I can't see how you'd be
able to take it out of the multi-pin connector and all that.  And if you
can't repair a single wire, where do I find a new wiring harness and how
much dinero can I expect to drop in the process?  Are there other
realistic
options for those of us who can't solder/weld/hot-glue worth spit?

Cecil