I have always wondered why my tach won't work, when I first got my car it would occassionally do a sporatic bouncing and rapid movement all over the place. This was rather rare however, so I replaced the amplifier on the fender, nothing, I cleaned all the contacts and checked the wires, nothing, I used an electric contact cleaner on the contacts, nothing, I then replaced the tach/clock cluster pod, still nothing.....using my multimeter on the cable that plugs into the tach in the dash revealed that it supplied 12.8-13.4 volts, depending on engine speed.....still no tach readout however. I put so much effort into fixing it, I just wish I could get it to work.....any other ideas of what could be wrong/what I could do? I tried the search....but didn't find any issues where the "cigarette butt trick" didn't work, I tried that and more... Help?

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