Newbie to a '85 Euro 500 SEC - everything seems to be great until night falls and I turn the headlights ON, within minutes - windshield wipers are going full speed & can't be stopped unless lights are turned OFF.
Also the wipers will engage if the horn is honked
(whether the lights are on or not).
Checked the fuses, all is fine; relays look good too,
but I am unsure of which relay controls these functions -
sorry, no manual to check & I've thoroughly searched all previous threads for info - please help so I can drive at night!