'95 Mystique Zetec
I had the fans stop working. I tested the fans using a scan tool. The car is starting to suffer 'Classic Wire Harness Disintigration'. Following the wires, from the fans, I discovered melted and shorted power wires. Tape them, fans work.
Here is the link to this problem
http://www.contour.org/FAQ/recall/99M03/Scroll down the site and you will find diagrams on where to inspect the fan wires.