Taking my car in to have the headlamp wipers fixed, the right one sometimes starts on its own, usually a day after washing for some reason. The left one stopped about 25% up from where it should rest one day.

As usual, neither of these events are easily reproducable, though when working properly they sound very loud, audible in the car. Should I expect the dealer to say "couldnt find anything"?

Also, should I take out my IPD wiper relay and put the stock relay back in? Would this likely cause me grief, or are they unlikely to suspect the relay?

Thanks much.

KC