Ever since I bought my 260z my tach has decided it has never wanted to work. Being that my car is an auto, it hasn't been too much trouble until now. However, a recent decision to attempt a manual swap and my general annoyance growing, I have decided to fix it. The issue initially seemed to be a connection issue, as the tachometer would occasionally come back to life mid drive and decide to work perfectly for me, apparently at random times. I took the dash off, cleaned all the tachometer connections, and reassembled everything. While the tach was out I tried my best to bench test it, with various methods, and couldn't seem to find a way that worked. The tach still works occasionally, but not too often. Before I continue ripping things out and go as far as to replace the tach, does anyone have any wisdom or prior experience to share with me. Thanks