2004 CR-V Tachometer working intermittently

Hi everyone! So the tachometer has been working intermittently for a few years now and I just wanna get to the bottom of this, tired of this issue.
I have resolved many issues myself with the CR-V but my electrical knowledge is that of a novice (if it’s electrical). Recently, I have purchased a multi-meter thinking this may assist me in the matter. While driving over a not so smooth road the tachometer would engage and display appropriate rpm’s and eventually stay on zero. So I’m guessing a loose wire or even more so a short. Also, my friend a while back had an OBD2 scanner and it showed a short but didn’t give enough information regarding a location or module involved.

Any ideas where should I start? Any advice is greatly appreciated!