Which Sensor?

[John Lagnese]

In my 91 200 TQ 20V the relay caused the fan to go on at odd times,
eventually draining the battery. This relay was behind the dashboard, not
the under hood relays.
John

-----Original Message-----
From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com] On
Behalf Of Radek
Sent: Saturday, January 14, 2012 6:23 PM
To: quattro at audifans.com
Subject: Which Sensor?

We are in a deep freeze here in Canada and the car thinks it's summer!  This
is a 1988 90Q, NG engine.  The radiator fan comes on shortly after the car
is started and continues long after the car is stopped.  Engine doesn't get
a chance to warm up, only goes up to 60C or so.  The temp sensor on the
radiator itself would be responsible for this, right?  Can I simply
disconnect the sensor and the fan will stop running?

However, I'm also not sure if the lower sensor on the cylinder head flange
(quadruple connector) is involved.  Background:  when we got the car, the
wires inside the rubber boot covering the sensor were completely rotted out.
I threw out the rubber boot, installed spade connectors on the wires and
connected them directly to the sensor - three wires out of four, that is.  I
looked at the position of wires in the boot and connected them accordingly;
however, there is still some lingering doubt in my mind whether I did this
correctly.  Would anyone be able to tell me the colours of the wires that go
to each sensor terminal?
Thanks!

Radek.
Ottawa, Canada
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