Re: battery drain while parked

[Dave Head <dhead@sundial.net>]

At 05:29 PM 1/6/98 -0400, you wrote:

>I did a quick check (it's raining here now) and have two 'sensors' on the
coolant
>head outlet, one on the top and one on the bottom.  The top one has two
blades but
>it is quite small.  If I were to check the bottom one I would be soaked, but it
>has a big rubber boot on it, two wires (I do like the wahr's another
qlister calls
>'em), and it is 'big.'  I believe another qlister got into this in detail about
>taking it out, puttin' your left  index finger over the hole so as to lose a
>little coolant as possible, and with the 'new' sensor in your right hand
>.....etc.  I peeled away the boot on the lower one and felt the innards
could be
>cleaned in some way (ie. contact cleaner) as it seems to be fairly open to the
>elements.  If I'm on the wrong track here please let me know.  Do you
recall the
>part number?
>
>BTW, your tag beats anything I have seen around here.  Did it cost you a grand
>like they do in Finland?  Another BTW, we have a Maitland here in beautiful
Nova
>Scotia as well.  Probably relatives ; )

Actually, the custom plate here cost 25.00 a year.
The top sensor is the one I'm talking about - here is a brief I prepared
'awhile ago' on it.

Date: Sun, 19 May 1996 11:54:45 -0400
X-Sender: dhead@mailhost.sundial.net
To: dans@ans.net
From: Dave Head <dhead@sundial.sundial.net>
Subject: Subj for archives: Audi Cooling

Dan, here is info for the Turbo/Turbo Quattro After run cooling system. I've
included info on cooling fan operation, since the Bentley doesn't give much
detail.

The after-run cooling system for 86 up turbos and turbo quattros consists of
a relay, thermoswitch, and an electric cooling pump. The relay is brown and
under the dash at the aux panel. The thermoswitch is located right next to
the upper radiator hose at the block connection, two blade connection. The
electric cooling pump is mounted above the ABS unit, beside the injector
cooling fan system.
Basically, when the engine is turned off, this system runs the engine
cooling fan at low speed and the cooling pump runs until the preset temp
(85C) is reached.
Additionally, this relay turns on the low speed portion of the engine
cooling fan whenever the AC is on (Bi-Level, AUTO, DEFROST) to assist in
providing more air flow across the condensor and radiator.
PART NUMBERS
Relay: 447 965 571A dealer cost about 105-112.00. Blau same, Shokan 45.00
used plus shipping.

Thermoswitch: 035 919 369S (old PN) or 054 919 369B. Dealer - 37.00, Blau
35.76. (this is for 87 tq - other years may differ...) Dealers have a very
hard time finding this on the microfiche.

Pump: 034 965 561C Dealer - 175-186.00, Blau 160.00, Shokan used 95.00.
Chris Semple has them for 135.00 plus shipping ($143.00). 

Audi 3 stage cooling system.
Audi provides a 3 stage engine cooling fan system via a flat, 90 degree
resistor pack mounted in front of the radiator, down on the 'frame rail'.
Older model resistor pack are blue anodized, newer are gold. The older
models are prone to failure. There are also low, medium, and high speed
relays to connect the fan to the appropriate portion of the resistor pack.

Low speed operates when the AC is on (some models controlled by AC
programmer, some by after-run relay), and when the engine is turned off, as
listed above.

Medium speed - cycles by the setpoint of the 3 wire thermoswitch located in
the radiator (around 92C to 85C).

High speed - Operates via the high pressure switch in the AC system. High
speed is not fused - direct input from the battery via the relay under the
dash. I know of no other thermoswitch control. If there is, please let me know.
********************************AUDI FAN***********************************
                                   EMCM(SW) Dave Head  
87 5KCStq 215K miles                1.85 or so... bar 
    qcusa #3442           Maitland, Florida     plate: STLTHTQ
******************************************************************************