Need 1971 M20C lighting control schemitc

[apriav]

Instrument lighting not working.

Looked in maintenance manual and could not find schematic for the control box (20LP05B).

Found what come out below, need the wiring inside 20LP05B (at the top of drawing).

 

[carusoam]

Do you have the two knobs on the ceiling?

one rheostat is for the cabin lights, and the other for the instrument lights…

Where that box is… might depend on where your control knobs are…

Stand by for somebody in the know…

Best regards,

-a-

[apriav]

Knobs are on the panel, Have a rheostat and a push to test with what looks like a light sensor. Transistor controlled.

In the picture at the top above autopilot.

[apriav]

I need schematic for control box part number 800275-501.

[Hank]

The one on my 1970 C smoked a component in flight, just after breaking out below the layer on a VOR-A approach along the OH-WV border. Took out the entire electrical system.

I was never able to find a schematic, and the burned out component left only the metal legs soldered into the board.

Try your favorite salvage yards and MSCs, along with @Alan Fox, @Jerry Pressley, etc. I got lucky, maybe you will too.

Best of luck!

[N9405V]

That box is a rats nest of wires and transistors. Good luck.


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[apriav]

Anybody have contacts at Mooney technical support?

[carusoam]

16 minutes ago, apriav said:

Anybody have contacts at Mooney technical support?

https://www.mooney.com/contact-2/
 

They have a few email addresses for various parts of the business…

What type of support are you seeking?

Best regards,

-a-

[apriav]

Need schematic for dimmer control box.

[apriav]

Thank you Frank.

I can make it work now.

Best regards,

Arnold