M20K interior lighting

[Bigdaddie]

Completed an avionics upgrade on my M20K last summer. I recently flew at night and discovered the Trim and Flap position indicators were not lit.  Should there be a backlight in there somewhere?

[Marc_B]

@Bigdaddie You have two rotary knobs that control glareshield and panel lights. Do these work? Sometimes it’s a faulty rheostat, other times it’s a blown fuse. But I believe you should have a backlight that’s tied to the Panel Light rotary knob.

 

[Bigdaddie]

Yea I guess they work.  There's not much lighting any more with the EFIS.  Glarsheild lights work.  But I just thought of something.  The light in the oxygen guage does not work and is on my list of squawks.  I bet it is the same circuit.

[jlunseth]

Mine work. Had to get a new bulb installed a few years ago, that did it. Not simple I don't think, the center console cover has to come off. I did it during some other electronics work that was going to require the cover to come off anyway. I don't think there is a light for the O2 gauge, if yours is in the left armrest like mine. If there is, mine has never worked.

[DonMuncy]

• My Oxygen does not have a light

[Marc_B]

Strange. I could have sworn my oxygen gauge does have a light. I’ll have to check. 
 

Edit: looks like IPC shows effectivity for all 25-0001 and on with possibly a light?

[Bigdaddie]

Maybe my O2 guage doesn't have a light???????

[shawnd]

In the M20K there is a small bulb above the O2 gauge inside the pilot side interior panel. That's 35 above in the IPC. 36 is the cutout if I am not mistaken.