I am installing a new radio in my plane and have come across quite an oddity.
Verifying wiring to the GIB position, this is what the multimeter gave me:
Pins 3 & 4 go to wires in a shielded cable,
Pins 1 & 2 go to wires in another shielded cable (should have been to the red and black power lines),
Pins 5 & 6 go to the shield of a cable.
1&2 are VDC+ and ground,
3&4 are HS left and right,
5&6 are the mic.
This was originally wired to an ICOM A210 and the radio was mono with one output that fed both pilot and copilot positions. This was sent to what I believe was a space saver panel?
Still, I don't know how the headset was functioning, at all back there. I checked my results several times, but got the same result. I'll be checking again next time I go to work on the plane.
I've ordered a new LEMO jack, but I am dreading trying to pull the wiring through the pilot seatback, especially since the wiring will have to be extended on a new jack to get to the junction I need to tie into.
Anybody got some input on this?