2nd cooling fan speed not working

[Kent McLean]

Calvin Krug wrote:
> ... the radiator cooling fan doesn't come on with it.  As I
> understand, it's a two speed system, and it's supposed to come on low
> in this situation.  I checked the resistors, and they seem fine, so
> next step is the motor.  Which terminals are high and low on this
> thing so I can test it?  

I just fixed my '89 200 TQ with a similar situation. The car
overheated, splitting a radiator seam. After replacing the radiator,
it overheated again, spewing coolant out the overflow tank. It 
turns out my problem was the fusible link, located on the RHD 
driver's side wheel well. Easy and cheap fix. Something rare on
an Audi.

For testing details, see Scott Mockry's excellent site:
ttp://www.sjmautotechnik.com/cooling.html#fan

Cheers,
Kent McLean