I gave my son my '97 1500 pick-up which now has very near 300k miles on it. Yeah! Anyway he told me the blow started making a clicking noise and gradually it got slower until it stopped blowing. Is there a way to test whether it's the blower motor itself or the blower motor control module? I haven't looked but will we have to take the dash apart or can it be accessed from underneath or maybe through the glove box? Thanks for any suggestions.