That wire is NOT used. It was part of the main harness because VW was
anticipating adding a "check engine" light. The other end of that wire
is in the engine compartment wiring box. You can see it on Bentley page
97.123 where it connects to the Digifant ECU pin 20 and to a dash
MAL-IND light/switch. AFAIK, the dash light/switch was never implemented
though the ECU trouble codes are stored and displayable if the version
type 022D ECU is fitted. Too bad this was never fully supported.

Mark

Marius Strom wrote:
> So as I'm installing my secondary battery kit last night, I had to pull out the fuse panel on my '88 Westy camper to make some modifications to the B connector (to bring radio/cigarette lighter/interior lights, etc. over to aux battery power).  While I had the fuse panel pulled, I noticed a grey/white strip wire attached to a yellow connector (male plug) just dangling back there ... not connected to anything.
>
> I know this is a really long shot, but I'm wondering what the right way to figure out  where that wire goes.  Bentley isn't helpful with this one, and I can't see where it could've connected to the back side of the fuse panel (most of those connections would need a female connector), nor can I find a vacant female connector hiding back there anywhere.
>
> I'm assuming it was there, disconnected, before I started anything... but I have this nagging feeling.
>
> -marius
>