my new to me 04 Road King has two switches on the back side of the forks. The right one turns on the extra head lights. The left runs to a plug inside the headlight and then disappears back under the tank somewhere.

Nothing seems to happen when I flip it. Would love to know what but don't want to tear bike down.

They seem to be factory or at least HD aftermarket.

Any ideas for me?

 

Accessory toggle to power the accessory plug under the seat from which you could power accessories

 

^^^^What he said. Hook up whatever you want to it.

 

I saw mention of the plug under the seat, so that is what controls it. Thanks so much.

 

Don't confuse it with what may be a battery tender plug sticking out from under the seat. It does nothing for that. Just FYI.

 

Dunno for sure . . . but on my '02 RK one is for the passing lights, and the other was for my cruise control. YMMV

 

Right switch on my '03 went to a dead plug, nothing attached and no power in to get out, just an options plugin switch.

 

And...might be a good thing to

 

I replaced that switch with a momentary push button connected to a Garage door opener under the seat.

 

I did, saw ref to plug under seat, but do not remember any ref to switches.