I am sure there is a post on this forum somewhere about this very thing, but I haven't found it.

Looking to plug some new handlebar speakers I got into the accessory switch. I found a plug(Grey) under the seat and another one under the handle bars. Got a plug from the dealer(Supplemental 12v Power Point) that was supposed to plug into either of those. It has the hot/ground wire coming from it. However what I got from the dealer does not even come close to fitting the plugs I found on the bike('12 FLHRC).
Any suggestions on exactly what I need to connect to the plugs on my Road King? I'll be taking it back to the dealer this weekend to see what they have to say but thought I would ask here as well.

 

the plug for the acc. switch is under the seat in front of the battery, kind of jambed under some other wires...if I remember right it is grey and 4 pin...

 

It is under the seat the 12v power point should plug into it.

 

The plug I found is in the very spot you all describe. And it is indeed grey. But it is not 4 pin. Some sort of other kind of plug.

 

The accessory switch plug on a 2012 RKC is a 4pin Tyco type plug inside the Headlamp nacelle. See Service manual Appendix B, Table B-1 #67.

 

The search function is your friend; you'll see what you're looking for in this thread--used "picture accessory connector" as search terms:

https://www.hdforums.com/forum/touri...onnectors.html

Typically, the accessory connector under the seat will have a rubber boot covering the end to prevent water incursion.

Just look a little more under the seat in front of the battery.

Good luck with your project.

Carl

PS: Owning the HD Service Manual helps confirm what your looking for/found because the wiring diagrams supply wire color info so when you find a connector, the wire colors in the connector can confirm what you've found.

 

If it is in the Headlamp I wonder why the MOCO moved it? It has always been under the seat, (grey 4 ping Deutsch Connector in front of the battery) especially since the most common accessories plugged into it seem to be Tour Pak or Saddle Bags power outlets etc.

 

There are actually three plugs under the seat on a 2012 Road King classic. On is a four point black that is plugged into an orange boot I believe. That is for the california purge solinoid. There is the grey tyco that you have seen that is a single point hot lead from the battery. Look deeper and you will fing another 4 point black deutch connector that ay be deeper under the other wires. That is the aux connector you are looking for.

 

Here check this thread out it has a picture of the three as well as explainations and wire colors listed.
https://www.hdforums.com/forum/touri...-no-where.html

 

I'm under the impression the OP is looking to connect to the accessory switch on backside of fork opposite the aux light switch. Isn't that switch connected to the plug in the headlight nacelle? Maybe my wires are crossed