cavalon

[Bilguun]

hello all
we have a some problem instruments on Cavalon 915iS . some instruments are stucking
how am i fix it ? please advise me . please contact me .

 

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[IBob]

Wiring diagram?

Also name instruments as your pics are not clear.

Edited May 5, 2023 by IBob

[Bilguun]

engine rpm indicator , oil temp indicator , CHT indicator

[facthunter]

 A bit of vibration may make them work again.  Nev

[IBob]

I have only experience with 912:

The oil temp indicator and CHT indicators come from 1 wire sensors that rely on the engine to be grounded (0V) to complete the circuit.
The RPM indicator is 2 wire, one side to ground (0V).

For start I would suspect a grounding problem.

Either that or a problem with the +12V to those instruments.

Is the engine properly grounded to 0V of the battery?
Is the 0V to those instruments properly grounded to 0V of the battery.
Is the 12V to those instruments reliably connected to 12V of the battery.
 

You will have to find a way to meter these things while the instruments are failing.