Windshield Wiper Slow 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 slow wipe position, the CJB energizes the wiper on/off relay in the EJB . The relay supplies power to the windshield wiper motor through a resistor in the motor. The motor will operate at slow speed until fast speed is selected or the wiper on/off relay is de-energized, removing the power to the windshield wiper motor.