Question about 1993 Audi 90

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I have hot wired the rad fans to run

Hot wired them directly to the battery and had to get a bigger wire - the size of a starter wire 10-12 guage. There's the big metal plate aka the ballast resistor that is part of a multi-looped circuit. Found out that this is a type of speed "regulator" for the fans. I'm beginning to believe that there are alot of problems with this circuit. I tested all the sensors and relays but the radiator fans still don't come ON. I am thinking I will have to replace the wiring somewhere/everywhere.
However - the radiator is still overheating ever with the fans on high. I replaced the thermostat already. I'm looking at replacing the radiator or adding another cooling coil.

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If you have hot wired the fans already why not bypass the speed regulator circuit you could add a 3 way inline switch to manually control your fans. Since you have replaced the thermostat, try checking the Rad to see it is circulating properly when engine is cold remove the rad cap start the car and look into the you should be able to tell if it is circulating or not. Have a rad shop test your coolant to make sure you have the needed blend to cool your engine this is normaly done free of charge. Good Luck to you!!

Posted on Jul 15, 2009

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I have a pretty bad stumble when its idling I have ommed out the injectors they are all at 28 checked the coils for spark done my plugs wires

Posted on Apr 30, 2011


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