I would like to adjust the park position of the passenger side wiper arm as it occasionally hits the rubber seal around the windscreen and makes a rather loud and annoying noise whilst driving in the rain. I tried to remove the black domed cap which covers the securing nut for the arm, without success. can anyone tell me how to remove it. Does it unscrew, or just pull off? I tried using a pair of pipe grips with some protection over the teeth so as not to damage the finish of the cap, but it would not budge!
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Thanks
Searching this subject on the internet has been unsuccessful.
Thanks