Rad Fan intermittant - killing the battery

[Konstantine Bogach]

I am facing same problem on UrS4 '93.  More accurately - faced, as after being intermittent for a while it decided to run constantly (without ignition on).
It turned out to be after-run relay.  It is actually control modue as there there is no coil and contacts inside.  Same unit is used in 200tq and UrS4 '92-93.  I am not sure what is after-run schema in your car.  SJM site describes this problem and shows picture of the module on UrS4.  200tq has it under driver's kick panel, UrS4 under passanger's kick panel.  Damn thing is dealer only and costs $112.  SJM mentions that resistor or transistor gets burnt but there are too many of them there.  
Initially, when debugging the problem I went crazy because it ran with everything on the diagram disconnected (2 relays and rad switch) but it turned out that the diagram in Bentley does not have after-run system in it, for UrS4 at least.

Konstantin.

>Problem summary:
>88 5k non-turbo
>Battery goes dead because the radiator fan turns itself on intermittantly .
>..with engine stone cold.



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