Wiper Under Relay Control electrical connection and wiring diagram of Jaguar XJ-S is shown in the figure below. Different models are cabled differently and therefore this diagram is a generic circuit that should help trace a fault. It shows the connection between components and parts such as the intermittent/flick wipe, fast wipe, slow wipe, term post, in line 35Afuse, delay unit, wiper motor. Here is the schematic [source: Kirby Palm, http://skjagtech.co.uk] :

1975-1991 Jaguar XJ-S Wiper Under Relay Control Schematic