In article ,
John Roncallo wrote:

Hello

I'm trying to find out if the Audio Pannel in our Clubs 81 C172 should
have back lighting or not. I dont know who makes it since there is no
name on the audio panel. But it uses a row of up and down toggle
switches to flip between functions and it has the marker beacon light
built in. Every time I fly at night I curse this thing because I can't
tell which COM is selected without pulling out a flash light. Im not
shure if the lettering should light up or not. Is there any way to tell?

John Roncallo


Try the time-honored way. Write up "backlighting on audio panel INOP"
as a squawk and see what happens :-)