I've got a wire loose

[Tony Lum]

At 05:56 AM 6/12/02 , you wrote:
>Dave,
>
>Not necessarily, my 4kq Canadian market had 2 speeds with 2 wires.
>The Ur-q has 3 speeds with only 2 wires, so number of wires do not guarantee
>the number of speeds.
>
>Hope this helps.
>Martin Pajak
>
>http://www.quattro.ca
>
>1983 Audi Ur-quattro (269,000 km) Canadian spec. winter car
>1985 Audi Ur-quattro (146,000 km) Euro spec. import ;o)

Audi typically mates the 3 terminal fan motor (2 speeds built-in) with a
chassis mounted resistor to get the 3rd speed.  The T89 cars also have the
resistor.  Audi in its design "genius" always uses a relay to short out the
chassis mounted resistor as long as the engine is on.  It gives my old T43
5ks a pseudo after run fan feature which you can hear quite clearly as the
fan switches to low speed when you shut off the engine.  The exception is
the '87.5 CGT which doesn't have the chassis mounted resistor.  It uses the
fan motor's built in resistor for normal cooling and the direct high speed
terminal for the overheat and, I think, the A/C high pressure switch.

Regards,


--
Tony
_______________________________________________________________________

Tony Lum                                  1987 5000CS Turbo Quattro
Berkeley, California, U.S.A.                1985 4000CS Quattro
Audi Owner/Driver/Mechanic by Necessity ;^)   1980 5000S Sedan
                                                1987.5 Coupe GT
                                                 1983 Ur-quattro
_______________________________________________________________________