I know this has been covered somewhere but I have a 03 Rk Classic and have seen the connector under the seat many times. I know it is controlled by the left switch on the nacelle.
Was thinking of wanting to have something run there so I can run my iPhone and keep it charging. It is the 4 pin kind. I assume I need some adaptor so I can use USB. Any insight appreciated. Thanks
Ps-for it to be powered up, switch must be on?

 

http://www.3brpowersports.com/products.php. Scroll down to the bottom of the page.

 

the 4 holes in the aux are all powered,one is ignition switch one is brake light switch one is aux switch one hot. u can use a crimp on duetsch? connector looks like a small banana plug about 10 cents or harley makes a harness about 20$.

 

I think you can get the aux cable with a cigarette lighter style connector from Harley for about 20 bucks...then plug in a cheepo $5 cigarette lighter/USB charger and you're all set

 

or if you've already got a battery tender pigtail on your bike; get the cig lighter at an auto parts store and build your own cable (plus the cheepo USB charger)

 

Here's what each wire does.

 

Or, go an even easier route with this!!!!

 

Does your bike have the 2 wires coming off the back of the headlight?? Orange/white and a black wire. If so, you can wire a 12v receptacle( cigarette type) and use that to power/charge your stuff. If the headlight is on, you have power to the plug, headlight off, no juice.....

 

Or, you could add a bunch of stuff...

 

Thanks for the great ideas. Just need to decide what route to go.