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Home » Bike customization » 3 in 1 LED turn signal install Sportster

Home » Bike customization » 3 in 1 LED turn signal install Sportster

3 in 1 LED turn signal install Sportster

by Tom / Saturday, 29 December 2018 / Published in Bike customization, Electrics
brake turn tail light 3 in 1 LED

Harley-Davidson Sportster 3 in 1 LED turn signal install.

Purpose Built Moto’s 3 in 1 turn/brake/tail lights have been immensely popular with Harley riders. In particular Sportster riders have taken a liking to these tiny ultra bright 3 in 1 LED turn signals. Opting for the cleanest finish possible on the rear fender, and often using it in conjunction with the Orbit Brake light.

3 in 1 turn signal install sportster harley davidson

Here I’m going to run you through an Install I completed on a 1993 Sportster 1200 that received an all round lighting upgrade from our product range.

What you need:

2 x Purpose Built Moto Dome X 3 in 1 turn signals

1 x Orbit Mini LED brake light

Bullet crimp connectors

Brake tail splitter (optional)

2 x 2 pin LED flasher relay (optional)

General hand tools will be needed as well as a crimp tool for the connectors.

Sportster LED turn signal install

If you’re replacing the brake light start by removing the seat and rear fender. A simple bracket can be made up to mount the Orbit LED brake light. The Factory cable stays can be used to secure the wiring.

3 in 1 LED blinker install Harley

Onto the LED turn signals for your sportster, remove the standard lights and unplug the wiring under the seat. The factory mount point can be used without any modification. On this bike I wanted to hug the rear fender with the turn signals which meant trimming the spacer. The new Dome X design has a 3 piece spigot design which allows easy modification for any custom situation.  Here I wanted about 6mm offset so the out of the box 15mm spacer was trimmed down.

3 in 1 LED turn signal install

Next steps are as simple as bolting the 3 in 1 LED turn signals up and Aligning them to suit. You can also run the cable back to the under seat connection and secure it now.
LED turn signal install harley sportster

Connecting the lights is like for like on the factory loom, purple goes to yellow for the turn signal, black to black. For the older HD sportster models (I’m going to guess and say pre-2009) you’ll need to update the flasher to make the LED’s function. These are available from any auto store for $5-10.

3 in 1 LED blinker turn signal

Locate your turn signal cancelling module, and splice a 2 pin LED flasher relay on both the Purple and the Brown wire. Its simple to do and far better than loading it up with resistors.

I’ll take you through the brake/tail light options.

Option 1: Brake light only

This requires no Brake/Tail splitter, and simply functions as an extra brake light. The red cable from your Dome X 3 in 1 LED turn signal get connected to your brake light cable. The turn signals will still function as per normal. The LED will show a secondary red light when the brake is applied.

3 in 1 LED install light sportster

Option 2: Brake + Tail light.

With the addition of the Brake/tail splitter, you can turn the Dome x 3 in 1 LED blinkers into a complete tail light. This allows Running light, Brake and turn in one tiny package. Installing the Brake/tail splitter is simple. The red is connected to the brake light, yellow connected to the running light, and the single red is connected to the Red wire on the Dome X light.
1 brake tail splitter will feed 2 x Dome x or Hollowtip x LED lights.

LED turn signal blinker install harley sportster iron 883

Now the LED light wiring is completed, throw your bike back together! At this point I would recommend to hit the ignition key on, switch the turn signal on, and stand at a distance of about 10-20 feet away from the bike. At this time, its best to get a clean rag and rub the dirt off your hands while nodding at your motorcycle with accomplishment. The more expert among us may replace the rag with a cold beer but that’s up to you.
LED blinker install harley davidson sportster
This Sportster also received a 5.75” classic headlight, with Dome x turn signals up front too. You can check out how to get the best finish on the front end of your bike here.
LED Headlight Install with integrated turn signals

Bobber LED light install

Sportster LED headlight 5.75"

About Tom

My purpose throughout this endeavor has been delivering the build experience to those who otherwise may not have ever had the chance. Taking an inclusive approach with your custom motorcycle project and focusing on making you a part of the experience. In parallel to this I also pour my energy into the manufacture of high quality, detail oriented and above all easy to install components for your motorcycle project.

6 Comments to “ 3 in 1 LED turn signal install Sportster”

  1. Scott says :Reply
    May 27, 2020 at 10:23 pm

    Are these UK legal?

    1. Tom says :Reply
      May 28, 2020 at 8:54 pm

      Yes, OUr LED signals have the E-13 homologation cert.

      1. Scott says :Reply
        June 5, 2020 at 2:37 am

        Thanks Tom

  2. Devin says :Reply
    June 7, 2020 at 6:55 pm

    What make and model rear fender is that on the Sportster?

  3. Anonymous says :Reply
    November 19, 2022 at 11:34 am

    Just got a set of the dome tail lights from you guys. Great lights, super bright. But the nylon nut, hollow thread set up isn’t great. Got one turn on the nut and it pulled right out the light, other one looks like same will happen, now it’s stuck half tight and I’m gonna have to grind it off. Normal nut and spring washer might be a better go for this

    1. Tom says :Reply
      November 21, 2022 at 3:29 pm

      Its a shame you didnt leave your details so we can get in touch about this.
      Thats never been an issue before if you see this send us an email so we can help out.

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