There is an easier way... I didn't come up with this but found it on one of these forums last year and did it on my '09 CVO Ultra...
Here goes:
You might want to try this. It's a trick I've used on the last 4 Ultras I've owned giving better night riding visability and it allows your passing lamps to stay on in both high and low beam mode.
One important thing for those who use their garage door opener. This method will cause you to lose the use of your opener. So if you use this method and still want to use your opener you will need to take off your front fairing and reroute the garage door opener lead into one of the dash toggle switches. The easiest method is to reroute into the horn button from the dimmer switch. Just means you will give a short honk every time you open or close the garage door.
HEADLIGHT TRICK
Open the left handlebar switchbox, and free the dimmer switch. There are three wires going to it: blue, yellow, and white. Cut the yellow wire about 3/4" from the switch, and tape or heat-shrink this stub. Now, simply splice the yellow wire onto the blue wire, insulate it, and put it all back together. Be careful not to pinch any wires when you tighten up the switchbox screws. Now when you switch to highbeam both high and low beams will stay on giving you better visability and as long your dash spot switch is turned on your passing lamps will also stay on with either low and high beam too.