Is written in your manual. Not any problem to find.
To check or the circuit and timer are OK, let someone else listen at the fusesbox at the motor.
The relais should tick with switching the...
Click on the link below
Click on Owner Guides
The Owner Guide ( which includes the fuse diagrams ) can be viewed online
Ford calls the rear defroster ( a heated backlight )
The rear wiper/washer fuse is a MIN 15 (15amp, blue-colored mini blade type fuse), and on the 1998-2000 Durango the fuse is usually located in the fuse panel inside the vehicle, behind/under the dash...