>From: roger sisler

>You know what I mean, people w/ the pre 86 vanagons(maybe post 85
>also).Looks like a electronic hook up of somekind.It has 3 prongs inside.
>Maybe for  a dealer diagnostics machine.Never, never ,hear of anyone
>mentioning this device. Dont know where the leads go , and cant find this
>on the Bentley wiring diagrams.Strange-if it is not in the 1000+ page
>Bentley, it must be--not of this world.........

Yes it is on mine too, 85. It is for the VAG Test Kit that the dealer and
lucky individuals have. These were also on the late baywindows. Here is one
for the Baywindows. The unit is listed in the Bentley see the ignition
section and you will see it there also listed is the adapter to make it
work. It will test a variety of ignition functions.

http://www.ratwell.com/technical/TDCMarker.html

Michael Knight
'77 Westy Deluxe, "el Verde"
'85 Vanagon GL, nameless
http://photos.yahoo.com/electrictrain@sbcglobal.net