My thanks to all for the great help. Tomorrow I will check with Volvo about the recall, then check with the local salvage yards.
It is nice being retired and having a little time to work on my own vehicles.

Unplugged small wire and it did not stop it. Noticed that are several fan units for sale on E-bay. Is it a safe bet that the problem is there or should I take it to the dealer and have it located. I would hate to spend the money on a new fan unit only to find out it is a control unit or sensor.

Thanks,
No check engine lights and the fan will continue to run until the battery is dead. Where is the DGM located and how do I identify it?

Cooling fan on 2002 XC70 will not stop running. What and where to check?