I plan to fit Lemo jacks as well as the normal GA phone and mic jacks but I've found 3 different wiring diagrams, one from Bose, one from Garmin and one from Vans. They differ in what you do with the shields for the wires between the GA jacks and the lemo jack.
Bose has you connect the shields to audio ground at the GA jacks - image from the Bose install manual.
Garmin has you run the lemo shield wires (and all other wires) all the way back to the the audio panel - image from the GMA 245 manual.
Vans don't have any shields at all on the wires between the GA jacks and the lemo jack - image from the RV-14 wiring diagram.
Does it matter which one I use?
Bose has you connect the shields to audio ground at the GA jacks - image from the Bose install manual.
Garmin has you run the lemo shield wires (and all other wires) all the way back to the the audio panel - image from the GMA 245 manual.
Vans don't have any shields at all on the wires between the GA jacks and the lemo jack - image from the RV-14 wiring diagram.
Does it matter which one I use?