Re: S4 Electric Radiator Fan Problems

[Luis Marques <marques@ti.com>]

If the after-run relay is anything like the one on the 4kq's, it _must_
have a good ground at pin 31.  If it doesn't, the radiator fan may stay
on forever after you park the car, no matter how good the relay is!  
Hope this helps.

Luis Marques
'87 4kcsq

> I have a 93 S4 with about 40k miles that has developed a problem with
> the electric radiator fan.
> I believe that when the car is hot and is shut down, this fan is
> supposed to come on for a certain period of time.  What has been
> happening lately is that the fan will come on and not shut off(until of
> course the battery is dead).  The fan will stop when one of the relays
> (I forget which one it is) is pulled and start-up again as soon as the
> relay is replaced.  I have tried a spare relay that I had, but the same
> occurred. (Both relays are good BTW)  I also thought that it might be
> the temp. sensor on the radiator so I unplugged the connector; no
> success here either.  Looking at the fuse panel I noticed a fuse(number
> 18 I believe) for something like a Radiator Fan Time Delay (5 cylinder
> only). Is this the culprit?