As long as we are on this topic, I have an '85 IC with tach for sale.
It looks to be in fine shape with 100k miles on the odo.  $100 +
shipping from Seattle.

Dana

On 21 Aug 2004 at 17:20, mark drillock wrote:

> The 85 tach style instrument cluster will work work in the 86 and later
> models. The 85 IC will not have the dynamic oil pressure warning feature
> and thus does not need or use the yellow wire you refer to. That yellow
> wire is only for the high rpm oil pressure switch, not used in 1.9
> models, not "required" in this case since the other switch will work the
> same as the single switch 1.9 models do.
>
> Your blinking led in the coolant temp gauge may well be a faulty gauge
> and probably has nothing to do with your swap. Failures of that gauge
> where the led blinks all the time are well documented on this list. That
> failure usually starts out with an intermittent failure of the led to
> stop blinking after the engine is started and then over time degrades to
> a constant blinking. The temp gauge can be swapped with relative ease
> once the tach is removed from the IC.
>
> (The 86+ tach cluster will not work in 85 and earlier models without
> some minor mods. The 86+ IC wants to see both oil pressure switch inputs
> and the other years don't have the high pressure/high rpm switch.)
>
> Mark
>
>
> Warner, Jeff (DSIO) wrote:
>
> >Volks,
> >
> >I've got an instrument cluster swapping problem that differs from the
> >norm.  I'm hoping it can be resolved simply but I've got my doubts.
> >Hopefully somebody has dealt with this before.  He we go...
> >
> >My sons '87 GL came with a tach.  About a year ago I swapped that
> >cluster for the clock cluster in my '86 Westy.  So far so good.
> >Swapped the speedos and everything worked as expected.
> >
> >Now I've picked up another cluster supposedly from an '85.  The date
> >stamp says 11/84.  I swapped it into his van and I get a blinking water
> >temp light.  Everything else appears to work.  It's apparent these
> >clusters are not the same in construction besides the obvious tach vs.
> >clock difference.  The '86 cluster (date stamped 2/86) has a circuit
> >board inside the speedometer whereas the '85 does not.  The '85 has
> >circuitry for the digital clock and of course the '86 doesn't.  The van
> >has a yellow wire at position 12 on the wire harness.  The piece of
> >harness still attached to the '85 cluster had no wire in that position.
> > I did not have a chance last night to try and identify the yellow wire
> >in the Bentley.
> >
> >If you're still following this, I'm guessing that the circuit board in
> >the speedo is related to the later oil presure system.  For that reason
> >alone I'm guessing this cluster can't be made compatible.  I'm also
> >guessing that the yellow wire is coming from the coolant tank sensor
> >and that this might have been new in the later models.  Just guessing.
> >Any way, is there anyone out there that has a solution to this problem
> >that doesn't require major surgery?  If not, I guess I'll be selling or
> >trading an early model tach cluster for a late model unit.
> >
> >Thanks.
> >
> >Jeff Warner
> >Galloway, OH
> >'86 Wolfy Westy "Barry"
> >
> >
> >
>