As I understand, he like me, wants to use CarPlay when he plugs in his wired headset as well. With the jumper/hack in place, CarPlay works perfect...but plug in the wired headset and CarPlay stops working.
Normally (without the jumper/hack) CarPlay requires the headset to be plugged in to be operational. Now with the jumper/hack in place, it's the opposite and will not be there.
So going back & forth from no headset to using headset, one would have to remove the jumper/hack. Too time consuming as the fairing needs to come off to access. Hence a switch to make it quick & easy.
That's my situation & take on it at least.

 

Following

 

I still want to be able to use my wired headsets.
With the jumper permanently in place it renders them useless.

Now I have the option…as Lefty said. Thanks again for the idea!!

 

Oh gotcha, ya that makes sense.

 

Anyone know if this can be done with the WHIM module installed, or has tried it? I have a 2020 CVO Ultra and I only have the wireless Headsets...

 

No, I don't think so as the WHIM plugs into the same connector that this jumper plugs into.
But if I'm not mistaken, you should have CarPlay accessible "because" of the WHIM.
As I understand, without the jumper, a headset needs to be plugged in...or wireless connection, in order for it to be activated.

 

No, you have a WHIM like me it's not needed.

 

The reason this hack works is it fools the GTS into thinking a wired mic is attached…it jumpers pins 4 & 5 on the WHIM connector (gray plug behind the radio).

This shorts the front headset Right & Left + signals together…so it must be removed if you want to attach a wired headset (or a Sena Freewire) at some point in time.

The switch option posted previously is a brilliant option…you only have to open the fairing once, but I would use a connector on it just to exclude the possibility of contact pin corrosion down the road.

 

SO If I understand correctly if I jump the 2 terminals on the plug in the fairing I can get apple carplay on my 2021 boom gts Will I need a download from HD Thanks in advance Joe

 

I cannot answer that..as I don’t know if anything changed from 19 to 21… but on my 19 limited… no download. I do have the latest software on my GTS…but that’s it.