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Axial Switchback Turn Signal Conversion Kit (15-17 All)

Item 390266
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$72.00 (kit)

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      Review & Installation Video

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Improves Lighting and Appearance
      • Uniform Light Distribution
      • Dual-Color "Switchback" Bulbs - Change from Cool White to Amber
      • 24-LED; 12 White, 12 Amber, Wedge Base Bulb
      • Kit Includes 2 LED Turn Signal Bulbs and 2 Side Marker LED Bulbs
      • Fits All 2015-2017 Mustangs


      Switchback LED Bulbs. By simply installing a "Switchback" LED Turn Signal Conversion Kit you will improve the exterior lighting and appearance of your S550 Mustang. This conversion kit replaces those weak incandescent stock amber bulbs with super bright dual-color LEDs for a unique custom look. The dual-color feature allows you to use the white LEDs for the running/parking lights, but when you activate your turn signals or hazard lights the LEDs change to amber like magic.

      Kit Includes. This LED Turn Signal Conversion Kit comes complete and includes a pair of two "Switchback" front turn signal bulbs and a pair of two white front side marker bulbs.

      Plug-and-Play Installation. Installation of the Switchback Turn Signal Conversion Kit is 100% plug-and-play. There is no cutting, splicing or resistors required, just replace your factory incandescent bulbs with the ones in the kit. It's that easy!

      Note About Operation. Seeing that Ford redesigned the circuitry of the all new S550 Mustangs, you will not need a resistor to slow the turn signal blinking rate. The exterior turn signals will blink at the same speed as they did before, however the interior dash indicator will blink at a different rate.

      Application. This Switchback Turn Signal Conversion Kit is specifically designed for use on the 2015 to 2017 Ford Mustangs, including the V6, EcoBoost, GT and Shelby GT350 models. Recommended for use with clear turn signal housings.

      Application Note. This Axial Switchback Kit is designed for Mustangs sold in the US market. They will not function properly on Mustangs sold in the EU or UK.


      Fitment: 2015 2016 2017 Details

      MPN# 390266

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (62)

      Write a Review

      Ratings Summary

      3.1 out of 5 overall rating from 62 customers

      Installation Time: Less than 1 Hour

      • January 05, 2020

        5 2016 EcoBoost - MartinC Installation Time: Less than 1 Hour

        Loved em!!

        Super easy to install and and changed the look so much!!! Love em

        Helpful (0)
      • November 29, 2019

        1 2017 GT - boostedstang Installation Time: Less than 1 Hour


        Bulbs fell out multiple times and both bulbs stopped working after three months. Don't spend your money on these.

        Helpful (2)
      • November 18, 2019

        2 2015 GT - RexH Installation Time: Less than 1 Hour

        Just be careful

        I had these for a few months and they look really good however the bulbs kept falling out of the housing, leaving me without a turn signal at times. I know this could have been an issue with just my stang. So I won't say this is a bad product especially considering price point. But I ended up going with Opt7 lighting instead. Way more money but totally worth it. Way cleaner look

        Helpful (4)
      • October 11, 2019

        4 2016 EcoBoost - KO Installation Time: Less than 1 Hour

        very cool product

        this is a very cool easy mod. my only problem is that the driver's side bulb has fallen out of the socket twice. Its a pain to fish it out of the hole when it does that. I resorted to putting tape on it to keep it in place. It worked out well. Then for whatever reason both sides stopped working after a few years. I'll order another set cause I like them so much. They are fairly inexpensive.

        Helpful (0)
      • September 18, 2019

        3 2016 GT - MidnightMustang Installation Time: Less than 1 Hour

        Excellent, at first

        Pretty good product; purchased them back in January 2018. Had them since then, and the only issue I've had so far were the switchbacks popping out. Easily fixed with tape. One potential issue I'm just now starting to notice are the sidemarkers looking like they're dimming down. Factory's are bright when I tested them, so it is the bulb. But apart from that, they did work. I assume I received a "better batch" when I had purchased mine; I did notice the less than desireable reviews lately. May switch to Diode Dynamic's switchbacks.

        Helpful (1)
      • August 19, 2019

        3 2016 EcoBoost - RichardS Installation Time: Less than 1 Hour

        Proceed with caution!

        First, the positive - These look great. The all white look is great, and the switchbacks have been completely worth it. The negative - I first bought these in fall of ‘17. Within 3 months, the right marker led was flickering. Still under warranty, AM took care of it, although I had to send back all 4 bulbs. The second set did great until a couple of months ago. The flicker came back. I replaced that one with a Sylvania with no issues. Fast forward to this week and the OTHER side marker starts flickering like a strobe light. Just put another Sylvania in. Bottom line....the swtchbacks are great, but the side markers are junk. Be prepared to change them.

        Helpful (7)
      • August 14, 2019

        1 2017 GT - Landono Installation Time: Less than 1 Hour

        Started Flicker After 1 Year

        I'm not sure why American Muscle stocks these as you can tell they have a history of issues. Mine started flickering after about a year so I'm going back to stock. Stay away.

        Helpful (5)
      • August 06, 2019

        1 2017 GT350 - Zdiss

        Second set in a year...Don't waste your money.

        I love the way these look and function... when they work. I'm on my second set in about a year and the second set is already flickering and the signal is not working on one side. I have a GT350 and these are extremely hard to get to due to the front side radiators. Basically have to take the front tires off and pull back the plastic and try to reach around the radiator, or remove the entire front bumper.

        Helpful (2)
      • July 31, 2019

        5 2016 EcoBoost - JeeminP Installation Time: Less than 1 Hour

        Awesome mod

        Stands out from the rest the mustangs i see around town, looks great and even helps to see a bit better at night. Took 20 minutes to install.

        Helpful (0)
      • July 01, 2019

        2 2016 GT - dfastiggi Installation Time: Less than 1 Hour

        Bad overall

        The quality of these bulbs is not very good from a fitment perspective. The larger of the 2 bulbs does not sit correctly in the harness and will eventually fall out while driving. This has happened to me about half a dozen times over the last year. Usually the bulbs falls out into the lens and its nearly impossible to fish it out but eventually you can. If the bulb rattles around in the lens for too long the bulb with eventually break so I am now on my 2nd pack. At this point I am just looking into replacing the whole housing for a LED option. In the long run it would have saved me time, money, and frustration doing that first.

        Helpful (2)

      Questions & Answers (7 answers)

      5 Top Rated Questions

      What is the warranty on these lights?

      • These lights carry a 30 day warranty.

      Helpful (2)


      • Unfortunately this kit is not currently available for the 2018 models.

      Helpful (1)

      How many lumens are the marker lights in this kit?

      I'm a little confused. The install video you have listed says the kit is for 2015-2018 S550's, yet the product page says it only fits up to 2017 models. What is the reason this won't work on a 2018-2019 S550?

      I have installed the units bulbs, However when signal is on the turn signal in the interior is faster than normal, usually happens when a indicator dies, Is there a way to rectify faster indicator sound?

      • Unfortunately, Vividline has not made a part to slow down the turn signal indicator on the dash and we have not made modifications to see what part would help with this.

      Helpful (0)
      Post Your Question
      2 More Questions
      So I have a 2019 Mustang and I was wondering if anyone knows if there will be this option for 2019 mustangs because it says it's only for 15-17. Thanks 1 answer
      Would it be possible to wire the white LED to the fog light switch? Purchasing the MP Concepts GT350 Style Bumper I hate having a dead switch. 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) LED Turn Signal Switchback Bulbs
      • (2) LED Side Marker Bulbs

      Tech Specs

      Will It Fit My Mustang

      • EcoBoost - 15, 16, 17
      • GT - 15, 16, 17
      • GT350 - 15, 16, 17
      • GT350R - 15, 16, 17
      • V6 - 15, 16, 17