Re: after run fan on 4k/coupe

[ti@amb.org (Ti Kan)]

Buchholz, Steven writes:
> My old 1978 Fox has this "after run" feature, in that the fan circuit was
> always powered, so if the switch said that the coolant was hot enough the
> fan would go.  The car also has a warning sticker stating that the fan could
> start at any time.  The '85 4kq seems to shut off the fan when I turn off
> the car ... and I don't see a warning sticker, so I've always assumed that
> was the proper behavior

My 80 4000's radiator fan is also directly wired to the battery.  It will
come on any time the thermoswitch activates.  This is a single-speed fan
and no relays of any sort.  The only related relay in the radiator fan
circuit is for the A/C... the fan also comes on when A/C is turned on.

My 84 5000S Turbo, however, has its radiator fan thermoswitch wired
through the ignition switch, and has the fancy 3-speed control via relays.
Thus, the fan will stop when ignition is shut off.  The injector cooling
blower, on the other hand, *will* run if the underhood temperature is
high enough after shutoff.

My A4 2.8q has both a mechanical, engine-driven fan and an electric
fan.  So far I have not observed the electric fan coming on except
when the A/C is on.

-Ti
96 A4 2.8 quattro
84 5000S 2.1 turbo
80 4000 2.0
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