What are the DC motor wires in the picture for?
What you have there is an engine coolant fan from some sort of VW vehicle.

According to page 97-940 of the VW Jetta/Golf/GTI 1999-2005 service manual published by Bentley Publishers, brown-black and red-black go across the motor, and red-black and red-white go across some sort of resistive sense device, possibly some sort of thermal device. I can't supply an image of the service manual, but the fan is either device V7 or V35 on the aforementioned page.

The fan itself is meant to be connected to the coolant fan controller (J293), but unfortunately I have no further information on said device.