FOUND IT!! It's in the fuse box by the battery. Take the lid off your fuse box (which is a complete PITA to take off and put back on, btw), and according to the owner's manual, it's the largest square black relay. Mine was labeled "++15021 1E" on the top of it. The owner's manual calls it the "High Speed Cooling Fan Relay". Just unplug the old one, plug in the new one (which is actually for a Ford Transit) and you're done!