On 16 May 2005 at 16:29, Michael Knight <vwdormer@HOTMAIL.COM> wrote:

> >From: John Bange
>
> >Actually, the early model just uses a simple passive system: If the .3
> >sensor closes contact, the oil light comes on. The newer system runs
> >everything thru a small L-shaped circuit board inside the speedometer
> >housing. Probably the easiest way to keep the system from switching
> >focus from the .3 sensor to the non-existant .9 sensor is to cut the
> >trace carrying the tach signal to the board inside the speedometer.
> >The board is fed through a long multi-pin header along the top edge of
> >the rear of the speedometer.
>
> I will pull the cluster when I get home and see what I can find. I do have
> the other to compare to as well.

Perhaps of interest to some, while we're on this topic, is that the late style 2 sensor
"dynamic" oil pressure system (the L shaped circuit in the speedo housing) is
*identical* to the same circuit used on 85-89 gas model Golf/Jettas. Furthermore, by
swapping in a turbo diesel Jetta tach and dynamic oil pressure circuit, the dynamic
system can be fitted to a late model Vanagon. I just did this on the weekend with my
'88 Westy cluster, after confirming part #s in EKTA. The diesel circuit is different due
to different output for the diesel tach. In theory, if one were to use something like the
Dakota Digital diesel tach signal converter, the stock gas dynamic circuit  (and tach)
could be used.

Shawn Wright
http://zuiko.sls.bc.ca/~swright
'85 Jetta D
'88 Westy 2.1L, soon to be 1.6TD 5 speed
 (see progress at http://members.shaw.ca/vwdiesels)
'82 Diesel Westy