Tachometer woes

[street]

I may have capacitor issue on my 71 tachometer, are there any simple steps out there to replace. It has been bouncy for years, I suspect the wiring is still standard although it’s rum lumminition. So replace capacitor and redo wiring for above? Any suggestions.

Tachometer bounces on start up, steadies and then dies.

Thanks

[alan.barker]

First check Earth on Tacho Body.
The tacho is held in Dash by a Bracket and round knurled nuts (thumb screws).
the earth is a ring crimp under one of the knurled nuts.
The knurled nuts come loose sometimes causing a bad Earth.
Alan

[billwill]

This issue has been covered many many times.

Here is a little light reading for the oP.

https://lotuselan.net/cgi-bin/search/se ... oom_sort=0