It seems to just stop dead, no float or movement once “pegged” at 3k. So your comment about debris sure seems possible. I think it worked fine at some point in the past 🙂 Maybe I never went past 3K? ha ha
I did replace the old incandescent dash bulbs with LED kit a year or so ago. Now looking carefully at new bulb and tach now that it is removed, it almost seems like the new LED could actually be touching the circuit board, that doesn’t seem like a good idea.
With a little guidance I could try removing the case and looking for debris etc? I will try to attach a pic or two of the back.
I would also be totally happy with sending it to you Tom and have a fresh fully functioning unit to install. I’ll need a current address to send it and we can take care of that offline from the forum. Glad to hear that you are still busy with car tinkering!!!
I would like to get new o-ring for reinstalling as the old one is barely in one piece now. Is there a source for them??