NO RPM no tach reading Faria gauge?

[SILENTKNIGHT]

I recently removed my axiom chart plotter to send for update & repair and now my RPM Tack upper & lower helm don't work ?

I have power at both .

 

[Comodave]

Do you mean the tach doesn’t display on the Axiom?

 

[SILENTKNIGHT]

Hi Comodave ! Thank for the fast reply. i found the problem it was the sending unit loose on the engine. Its an analog gauge ( Faria)