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The clicking is your wiper relay. That means your switch is working, and almost surely the relay is working. The only things left are the motor, ground and wiring between. I suggest you check for voltage and ground at the motor. If no voltage, check for wiring problem between relay and motor. If voltage is present, check the ground. If you've determined grounding is good but motor doesn't operate, replace motor.
There is a ground wire on the 91 and older, i know this for sure. But its behind the light switch on the older ones. its in the glovebox on the 92 and up.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
