Ron Gordon wrote:
My Press-To-Test indicator light for my landing gear has three lugs on the
back for three separate wires. Can anyone explain the appropriate hookup for
these three lugs so that I'm sure to hookup the correct wire to each of the
lugs?

One goes to the + bus, one goes to ground, one goes to whatever switch
illuminates the light.

The Press to Test feature needs power to light the light.