I did it without BBUS, T4, etc. Fairly straightforward, the headlight wash works in conjunction with the screenwash but using two relays means that, as with the OEM set up, the headlight wash only operates when the lights are on. Doesn't use an excessive amount of screenwash. Needs two relays, wire, spade connectors (for relays), inline fuse holder . . . . think that's about it. See wiring diagram attached.
Last edited by stevestrat; 10th February 2019 at 15:12..
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