Slow Wipe
WARNING: This page is about a different car, the 2018 Jaguar XE and 2017 Jaguar XE. 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 Body Control Module/Gateway Module (BCM/GWM) assembly detects a Local Interconnect Network (LIN) bus message and energizes the wiper relay. The relay is in the left Engine Junction Box (EJB). The relay supplies power to the windshield wiper motor via a resistor. 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.