I have purchased a 2004 NB Cabrio with an inoperative top. Research thru the various threads said a good bet was the latch microswitch since all of the windows don't index when the latch is turned. I replaced the microswitch and that appears not to be the problem. The windows do index on occasion. Sometimes 3 of 4 or 2 of 4. Any thoughts as to what I should do next?