In pre-98 Xantiae, the wiper relay was under the habitacle fuse box/diagnose
plug compartment (I'm not really sure where the hell is into an UK car: at
your right, right?)
I understand that post-98 cars should have the relays in the same place, but
there are at least three relays involved: two for the rain sensor and one
for the "regular" intermitent wiper.
12 and 13 are the rain sensor relays, 18 is the other one.
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