Windshield Wiper Fast Wipe
WARNING: This page is about a different car, the 2019 Jaguar XJ and 2018 Jaguar XJ. However, it is still accessible from the selected car via links, so may be relevant.
When the driver moves the wipers and washers control switch to the fast wipe position, the CJB energizes the slow/fast wiper relay in the EJB . The fast/slow wiper relay contacts supplies the power directly to the windshield wiper motor, bypassing the resistor used for the slow wipe. The windshield wiper motor will operate at fast speed until slow speed is selected or the relays are de-energized, removing the power to the windshield wiper motor.