[urq] Sensor P/N that triggers the coolant warm-up light?

[Renneisen, Eric 475]

Bruce Bell wrote:
> According to the schematics the two wire switch on the 
> h20 manifold going to the head is responsible for cold 
> and over heat lamps in the dash. I've confirmed this 
> on my car as follows:
> 
> If I ground the wire at the temp switch (on the h20 
> manifold) (0 ohms) my light illuminates.

Yup, same here.

> For the two pin sensor located on top of the water 
> manifold, my car came with 056 919 369P "dual 
> temperature sender" (black). Both the Euro and US FA 
> show this at the back of the Cyl. head. 

Yup, Tony Lum pointed me to the page showing that sender at the back
yesterday.  At some point they moved it from the back to the front.
That FA page shows the rear sender changed starting in '83, but the page
with the front sender shows the flange changed starting in '84.

> The FA Shows 049 919 501 B (white) for the top of the 
> water manifold and this is a very different sensor. 

Yes, must be yet another screw-up in the album.  It clearly shows the
white gauge sender where the black sender should be.  4KQ and CGT have
the white one.

> After replacing the 056 919 369 P sensor with a new 
> one my idiot light worked fine. 

So, that's the one I need for sure.  The white one is available
aftermarket for $13.  The correct black one appears to be dealer-only
and $42!  I know a bunch of folks have gone for the temp gauge, so
anyone have a known good black sender they want to part with?

I'll keep the white one and add a gauge at some point (as soon as I
decide were to mount an aftermarket boost gauge).  Luckily, I have the
coolant flange with three sender ports, so I can have both the warm-up
light and the gauge.

Thanks everyone!
Eric R.
'93 S4
'86 urq

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