[ChiefPilot]

I'm rolling my own GPS annunciator panel and have the wiring etc. figured out etc. but can't quite come up with the remaining answer: What color for the annunciators? If it's in TSO C-129A, it's eluded me pretty well so far. Does the color of annunciators even matter from the FAA's point of view?

 

[Garage Guy]

The TSO is very generic, but the install manual for the GPS you plan to use may get specific about this.

For example our GX60 install manual says "The GX60 installed for IFR non-precision approach operation requires the following annunciators:"

MSG: amber
PTK: blue or white
OBS/HLD: blue or white, with included switch
APPRCH: blue or white
ACTIVE: green

--Paul