[urq] oil pressure gauge gremlin

[Brandon Rogers]

I think there is a small single pin oil pressure sender for the dummy
light and both pins on the bigger 2-pin canister sender are for the
gauge.  Or vice verse.  I'm not totally sure.   I just know I have two
senders...using 3 wires.  Both senders are in the same general location
on the block...

HTH somehow...

Brandon 

-----Original Message-----
From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] On
Behalf Of SpotatAshleys
Sent: Sunday, March 09, 2008 2:19 PM
To: urq at audifans.com
Subject: [urq] oil pressure gauge gremlin


Here's a question for an Audifan with a WR engined quattro (or intimate
knowledge WRs) I want to fit a VDO oil pressure gauge (and oil
temperature gauge) from a Coupe GT. Currently, the car (an '87 WR) has a
two terminal oil pressure sender (terminals presumably marked WK and G -
WK for autocheck and G for gauge). One wire (Blue with white stripe) is
connected to one of the terminals but I can not see which terminal. To
test the gauge before trying to fit it I connected the gauge signal wire
to the (currently) unused terminal on the sender. When the ignition was
switched on, it resulted in the gauge needle going all the way across
the scale suggesting a short to earth. I deduce from this that I had
used the wrong terminal (as I say, I can not see which terninal is which
with it in situ). So I disconnected the blue/white wire from the other
terminal on the sender and connected the new gauge signal wire to this.
Now when I switch on the ignition and start the engine the gauge works
correctly. Only problem now is that the oil pressure light on the dash
stays on all the time and the auto check lady keeps telling me to check
the oil level. Anyone know a) what is happening b) what should be
happening c) what sender or senders the car should have and what they
do, and what colour they are/ part # etc. I do have another drilling in
the block that could take a second sender if that will achieve what I
want i.e. the gauge to work and the autocheck to function as it should
also. I would stress that I know for certain that there is no problem
with oil pressure or oil level. This is purely an electrical issue. As
always, any information gratefully received. Many thanks

Keith

'87 WR
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