M20J how did you disable vacuum annunciator

[gacoon]

Removing vacuum system on J model.  What is best way to disable vacuum warning in annuciator light panel?

[Rick Junkin]

Remove the bulb...?

Sorry, that wasn't helpful but I couldn't resist.

Cheers,
Rick

[RLCarter]

Removing the bulb makes it in-op, it would be better to disable the system by killing the power to it

[Andy95W]

1 hour ago, RLCarter said:

Removing the bulb makes it in-op, it would be better to disable the system by killing the power to it

But then it really IS inop- without a vacuum system, you always have low vacuum pressure, so the light would have to be on unless you removed the lightbulb and vacuum annunciation entirely and noted it as such in the logbooks.

So I think I'd remove the bulb, kill power to it like Robert said, and paint the light cover with flat black paint, and make sure your mechanic noted that the annunciator had been deactivated and removed.

[ArtVandelay]

Since I removed the vacuum system, ram air, and added JPI 900 so did not need the fuel low/voltage annunciations anymore, I removed the whole thing, added separate lights for gear down and gear unsafe annunciations.

[Steve W]

From the service manual and electrical diagram(in my 1994 at least) the low and high vacuum signals are independent and switch to a high voltage to make the light illuminate. So, find the switch and tie both the lines to ground and it should be happy. Or just cut the switch out and leave them floating as it appears that's what happens when the sensor detects neither high nor low.