Turns out there are three 470 ohm resistors on my old foil. I had to extend
the leads on one, but works perfectly!

Thanks again.

Stuart

-----Original Message-----
From: vw_van_fan_Mark [mailto:madvws@cox.net]
Sent: Tuesday, January 26, 2016 5:26 PM
To: Stuart MacMillan; vanagon@GERRY.VANAGON.COM
Subject: Re: rewiring '87 foil for an '85 single oil pressure system?

Yes, you jumper the foil plug with a 470 ohm resistor. That is what the
factory left out or put in to enable the later foil to work as a replacement
foil for both types. Resistor "in" for 84/85 tach foil replacement with a
simple single oil switch setup. Or resistor "out" so the foil uses the
dynamic oil circuit board found in 86-91 vans with 2 oil switches. Here is a
photo of how to do it.

http://images.thesamba.com/vw/gallery/pix/486175.jpg

Mark

Stuart MacMillan wrote:
> Swapped my wonky '85 cluster for one from an '87, and the oil light
> flashes and the buzzer buzzes all the time.  I have an OP gauge, so I
> know everything is fine.  I need to rework the later type OP warning
> system to work in an '85.
>
>
>
> There must be a way to jump the plug or something that goes into the
> speedo to make this work, anyone know how?  I've unplugged it for now.
> Even with a gauge, I'd like to have the light, and now it doesn't come
> on when the ignition is switched on.
>
>
>
> The GoWesty foil replacement kit says it has a dip switch for this, so
> it must be possible.
>
>
>
> Thanks!
>
>
>
> Stuart
>