1. Remove the outer fairing and take a close look at the wire bundle that goes to the headlight. Looking at the headlight connector, one of the wires will be yellow. This is the low-beam circuit.

2. Now peel back the plastic wire loom covering this bundle until you come to the point where the yellow wire splits off into two wires. One of the two wires will be a smaller gauge than the other. This smaller gauge wire is the one that supplies power to passing lamp switch.

3. Cut the smaller gauge wire from the splice point in the harness and then protect the main yellow wire that goes to the headlight before putting everything back in the wire loom. Since I am good with wiring, I just cut the splice out of the harness completely and soldered in a piece of yellow wire to replace it, using heat shrink to insulate the solder joints. If you prefer, you can also use splices to splice in a new wire segment. Again, you can leave the original splice joint in place, it's not gonna hurt anything as long as you cover it somehow to insulate it from the rest of the wiring in the bundle.

4. Elsewhere in that jumble of wires under the outer fairing you should find an orange wire with a white stripe. (It may have been one of the wires in the bundle that went to the headlight.) It will most likely have a black connector on it with a female blade terminal inside and it usually has a red or black rubber cap on it. This wire is powered by the accessory circuit whenever the ignition is on. It is only used on international models that require a specific kind lighting but is not used in the U.S.

5. All you gotta do is crimp a male blade terminal on the yellow wire identified in step 2 above and plug it in to the unused orange wire. That's it, you're done.

Now you'll be able to operate your passing lamps regardless of the high or low beam of your headlight. Bear in mind that you may be in violation of some state laws that require you to extinguish your passing lamps when your high-beam is illuminated.

Ride safe!

 

Thank-you, TGPB. I'm on it !!

 

Okay, I just did this. Used BigDave's method as I already have a fender tip light, and if I ever need an accessory 12v switched wire I will do this the other way.
I got home from work, kissed my better half and went to the garage for a beer. Stood there looking at the 'King and thought Self, take the headlight out and just look at the wiring. 1 hour later it is back together and I have switchable passing lamps !! Thanks to all for the help, love this site !!

 

From what I'm seeing the harness only works for bikes upto 2013 I'm trying to figure out how to do this on my 2018 ultra classic

 

I do believe its a dealer flash...........

 

Nice! Thanks

 

On my 2013 RKC I spliced into headlight and highbean and low beam running lights on.


On my 2017 Limited I had the deal flash and they are on all the time.

 

I told a guy he had passing light out. He said they do that when blinkers are on. WTF value is that? Harley desperate to think of new features?????

 

This is what infused on my 2012. It was simple plug & play, and you could still turn the spots off if you wanted. They would then turn on with either low or hi beam.

 

If the dealer did the flash properly on your ‘17, then you can turn the spots off & on, with either the low or hi beams on.