There is a "Wiper Motor Pulse Board Module" underneath the ash tray, behind the trash bucket and behind the floor vent. Remove ashtray, 4 Screws for bucket and two for vent and you can see the metal encased module.
Underneath the dash with the hazard and wiper relays. All three and possibly another mount into a grey panel. The wiper relay is white.
The wiper motor relay is in the box, built on the wiper motor.
There are many, many possibilities. They're not very specific. An acceptable replacement is a Standard Motor Products RY116.
There is no relay for this wiper motor. A PCB on the motor handles speed and intermitment changes.
It controls the power to your wiper motor.
relay
Inside the wiper motor.
Behind the fuse box underneath the steering column.
under the hood in the relay center
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The relay is attached to the bracket that holds the wiper motor to the hatch.