"Ron Gordon" wrote in message
.. .
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?
Thanks!

If the lamp assembly you are using is an MS25041 type, the solder lugs are
numbered. If you have a metal airplane, or intend to use negative ground
busses at various locations in the airframe, then wire the lamp assembly as
follows:

Lug 1: +
Lug 2: to switch(es). If you are only using one gear-down indicator, wire
the switches in series, with the last switch having one lug connected to
ground. If you have two or three gear down indicators, connect lug 2 of
each to a SPST NO switch, and the other switch lug to ground.
Lug 3: to ground.

The lug numbers are normally stamped on the lugs, or nearby. If you cannot
read them, looking from the back, with the center lug (#1) on bottom, #2 is
on the left and #3 is on the right.

Hope this helps.