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2015-2017 Ford Mustang 4th Brake Light

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$80.00
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2015-2017 Ford Mustang 4th Brake Light

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SPECIAL ORDER, WILL SHIP IN 10-20 BUSINESS DAYS

If you're looking for a way to make your S550 Mustang stand out, here's a perfect solution! The Diode Dynamics 4th Brake Light Kit converts your factory reverse light to shine both bright white, and red. Not only do you get an upgraded backup light, you can also add a red running and brake light, for a unique, modern look on the road.

Red Running Light: The red light comes on at 50% brightness anytime you have your parking lights or headlights on, to serve as a rear fog lamp. This provides a distinct appearance at night, complementing the factory LED tail lights.

4th Brake Light: When you hit the brakes, the red light powers at full brightness, to serve as a supplementary brake light, for greater visibility and a unique look.

White Reverse Light: Anytime you're in reverse, the red shuts off completely, so your backup light can illuminate in a crisp, white color. There is no change to the factory reverse function, you just get an improved output from the white LED!

With the included wire harness and replacement LED bulb, the kit is completely plug-and-play, and installation should take 15-20 minutes.

This kit has been designed with quality components, custom-tooled OEM-grade connectors, and embedded circuit protection, for high reliability over time. It is manufactured in St. Louis, Missouri by Diode Dynamics Manufacturing.

Compatible with US models only- not compatible with EU/AU Mustangs.

Bulb Size No
Year 2015,2016
Make Ford
Model Mustang V6,Mustang California Special,Mustang Ecoboost,Mustang GT,Mustang GT500, Mustang GT350
Application LED Bulbs
  1. An excellent idea Review by Eduardo
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    Not only it gave me the european red-light most EU cars have which is great on poor visibility conditions, it also made our Mustang GT stand out of the crowd. The new model S550 has been around for 2 years now and we are seeing more and more S550s! We arent the only ones in the block anymore. This simple easy to install 4th break-light made a sweet difference. It works well and causes no issues. It is also perfectly legal. I want to thank DD for the excellent products. We also have the red interior lights. Red interior lights from DD allows for better visibility inside the car and does not bother the driver view. I recommend it.
    The only negative thing about the 4th break-light for me was the price. A bit high but in the end it was worth it. Thanks!
    - Eduardo - 2017 Mustang GT - Black. (Posted on 11/11/16)

  2. Easy Install with video Review by CDNXTRM
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    Instructions were a little hazy but after watching the video on how to install it was a breeze. Nice addition to the lighting on my 2015 Mustang Gt. Looks great at night. (Posted on 9/11/16)

  3. Great Product Review by shorty
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    Installation was easy. I love the way it looks at night.Will order side marker next (Posted on 9/9/16)

  4. Installation Finiteness: Strictly the Facts: Review by SJJH
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    Just finished the installation on my new 2016 Mustang GT. Yes, I watched the site's video for insight, avoiding any blatant mistakes or errors. The following are my recommendations.
    1) The steel trunk bottom has TWO stamping openings and grommets for wiring access to the 4th Brake Light fixture. My vehicle's left-hand grommet has one existing factory 3/8" cable harness which the instructions direct you to use? Why? The right-hand grommet is waiting for the addition of the RED wire and is actually closer to the final build connector than the left grommet. This RED wire lead originates at the harness, terminating within the 4th Brake-light bulb connector. I purchased 1/4" flex tubing, inserted the red wire and continued to the bulb connector. Note: Installing the middle wire connector into the male connector requires patience and finess. After removing the receptor's plug, I utilized a 1/4" pea size amount of electrical grease and the connector inserted and found its seating without incidence. Beware, this connectors insertion requires a clear view and likely laying on your back. Upon completion, like others I used 30, 3" black electrical straps to tie-back the cable assembly in the trunk and beneath the vehicle. Clearly, my install appears factory and doesn't cause concern/attention to any Dealer Mechanic beneath or within my truck liner. I didn't want to learn of warranty issues, refused repairs or blown fuses due to the exposed red wire beneath my vehicle, Regardless of its 18" length. Do it right, or stay beneath the shade tree! (Posted on 8/23/16)

  5. Awesome Conversion installed with Sequencers Review by JChavez
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    I installed this kit along with the sequencers, I highly recommend doing both at the same time. The installation was very easy and straight forward, the only challenge I had was getting the pin into the connector without breaking it. The cosmetic upgrade is night and day and I can see much better with the back up light now. Highly recommended! (Posted on 8/15/16)

  6. Excelente! Review by Rene
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    Facil de instalar y da un look impresionante al carro, excelente producto! (Posted on 5/22/16)

  7. Wow looks awesome Review by Jerry
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    This was a very easy install except having to remove the shaker speaker other than that very easy and well worth the money (Posted on 5/21/16)

  8. Fantastic look!! Review by William
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    I bought and installed the 4th break light on my 2015 Mustang GT and the looks are FANTASTIC. It took me about an hour because I had to remove the Subwoofer in the trunk. But it was worth it. It looks FANTASTIC!! (Posted on 4/17/16)

  9. Unique Reverse and Fouth Tail Light In One Review by Thomas
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    This is a very good quality option to add to your Mustang. The wiring harness that comes in this kit is very high quality. I was impressed when I opened the box and saw the contents. The bulb looks like it is very well made also. Now I have a unique looking Mustang. I will be ordering more lighting kits from Diode Dynamics (Posted on 4/10/16)

  10. Great item makes it safer for me to enjoy my GT350 in traffic. Review by Rancherogt
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    Install was easy just plan on about an hour and half or two if installing on a GT350. Since you have to lift the car and pull down the rear diffuser on the back of the car. But its all plug and play and pushing in the 3rd wire on the reverse lamp connector is only one way. Look for the small tab on the crimp and line up inside the connector. Works very well and looks awesome and makes the GT350 stand out from the crowd.

    The only improvement to this product would to include about two dozen wire ties to tidy things up. (Posted on 4/2/16)

  11. Awesome look Review by Roger
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    Love the look of these and the installation videos are a big help. One word of warning, the GT350 install is a little more time consuming and complicated than the GT (think rear diffuser). All in all worth the effort. (Posted on 2/23/16)

  12. Took a bit more time on the install Review by ammcpq
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    Installed this at the same time as the sequencer kit, installation straightforward though I took a little longer and routed the cable down to the reverse light through the existing harness grommet on the drivers side. The connector that pushes into the plug is crimped rather than soldered so I changed that also to ensure a good permanent connection. I then ran some conduit from the existing harness round close to the plug to protect the wire from anything getting thrown up off the road, the result looks more factory and there is no risk of the cable shorting by rubbing against the side of a grommet and the body of the car, Use 3M insulating tape to finish the job off (yes its more expensive, but it is VERY sticky and does not weather as bad as the cheap stuff) and you are done, the result is a much safer car and the reverse light is MUCH brighter at night and picks up better on the backup camera to see what's back there, service and delivery from diode dynamics 10/10 and will be ordering switchbacks next (Posted on 2/21/16)

  13. Pretty good Review by joe
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    INSTALL WAS EASY BUT AFTER A MONTH IT FAILED ON DRIVER SIDE. called DD and sent a new one out. Might be the R sequencer I didn't mention that because I had it so long . Haven't got the new one yet but sure it will be just fine....
    (Posted on 1/18/16)

  14. Cool and Safer Review by Zach
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    Looks great, I was following the instructions and had difficulty "clicking" the middle metal prong through to be flush with the surface. Just a tip that I would have wanted going into this: look down the middle hold with a light and take note of the shape. It's a square with an opening on the bottom left side. This opening aligns with the metal piece you have to shove into it in order to get it snug. All three other ways wont allow you to get pushing properly, so once one of the ways goes in deeper you have it right. I wasnt able to put it deep enough that it was at the front like the existing two wires. I made sure it was snug and then tried it and it works fine. It's also important to note that I am using a different brand of sequencer (starts with an 'R') and it seems to be working just fine. I would have gone with the DD ones but I had them months before DD released theirs. (Posted on 12/31/15)

  15. 4th brake light Review by Jesus
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    Fantastic product. Fast shipping, easy install,looks amazing (Posted on 12/22/15)

  16. How to make great even better. Review by WHIP5oh Jesus Perez
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    While I like the rear of the new 2015 Mustang GT. I knew that there was something missing. Diode Dynamics was onto something with the Cool White reverse light and seeing the Euro spec Mustangs with the Red running light made me want this upgrade even more. Shipping was fast, ( Delivered on Sunday). The kit comes with self directions to make the install fast, as well as the video you can view. The install was quick and painless. They only personal add on would be, zip tie the red connecting wire to the OEM wiring harness for the reverse light ( leaving small slack for a clean look). As I had initially pulled the red wire down and connect it to the harness and there was a bit of droop. All modes of the kit work amazingly. This gives you an added benefit of safety and looks. I recommend this product for all s550 owners. You can't go wrong, order it today. Brake, running brake light, reverse cool white and works with emergency lights. (Posted on 12/22/15)

  17. Great product Review by Stan
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    Installation was a breeze. The reverse light is a lot brighter than the oem. Everybody that I have demonstrated this light to is amazed by it. Don't hesitate to order it. (Posted on 12/18/15)

  18. Easy Install! Review by Lee
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    Install was straightforward and easy. It looks great and the reverse light is super bright. Ordering the switchbacks next (Posted on 12/16/15)

  19. awesome product Review by waynem
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    Just installed my mustang gt 4th brakelight and am loving everything about it,Install took alittle longer since I had to remove the factory subwoofer,but was not a big deal,also I ran the red wire through the rubber grommit rather then what video showed as vibration would eventually short out when insulation wears down,just poke a hole thru grommit and dap with silacone,light is bright and uniform,I also have sequencial signals which work perfectly,also when emer flashers are on, fourth brakelight blinks!!! (Posted on 12/15/15)

  20. Great product Review by Alex
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    Very pleased with the 4th brake light product it was easy to install took me only 15 minutes from start to finish and it looks (Posted on 12/15/15)

  21. Fantastic Product Review by Anthony
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    Makes the car look even better at night. easy install, includes everything you need to install. Works flawlessly (Posted on 12/7/15)

For complete installation guide please click here

Worry-free warranty

  • - Full 3-year warranty on all products
  • - No waiting: we usually send new items out with a return label (US customers only)

 

You will get quick help from our trained staff for any issues.

All Off-Road Lighting also carry a limited lifetime warranty.

For further details, please see our full article.

Domestic (US) Customers

  • - Just $5 per order with our Diode Delivers program
  • - Same-day shipping for all orders placed by 12:00 PM CST (or until 4 PM with rush processing)
  • - USPS, for delivery in 2-4 days (on average)
  • - Express services are available, see exact pricing at checkout
  • - Fully Insured

 

International Customers

  • - We ship to all countries via standard mail
  • - Usually around $10 for LEDs, or $25 for HIDs.
  • - Choose your service on checkout to see exact prices:
  • - USPS 1st Class: 2-5 weeks
  • - USPS Priority: 1-2 weeks
  • - Express EMS: 1 week
  • - Please email us if you are unsure about shipping to your country.


You will receive updates from our site when your order is shipped, along with a unique shipment number to ensure that your order is correctly accounted for. This allows you to easily reply to us if you have any concerns.

Whether your order is big or small, it is tested through many run cycles, and each bulb is tested before shipment. Every single bulb. Every time. And if anything does go wrong, you can rely on our industry-leading warranty for worry-free replacement.

If you're not happy with your items, we want to make it right. So we have some pretty awesome return policies:

Returns

30 day return policy. All customers have 30 days from the date of original order shipment to return items.

Full refund, no fees. At Diode Dynamics, we offer free returns. That means no restocking fees, no administrative fees, and no hassle!

 Free return label. If your original order was over $50, you get a free return label for your items (US customers only). If your order was less than $50 or international, you can send the items back through your preferred method.

Exchanges

Within 30 days: If your original order was over $50, you can get new items shipped to you with a return label (US customers only). If your order was less than $50 or international, we can send you the new items first, but you are responsible for returning the old items.

Within 90 days: Any item can be returned for exchange or store credit within 90 days. The buyer is responsible for the cost of the return shipping, and must first return the old items. We'll still cover the postage for the new items.

 

Please note: due to the nature of custom acrylic pieces, we cannot offer any refund or exchange for returned custom acrylic items.

 

To make a return or exchange, please request an RMA, or give us a call. When we get it back, you will be notified and credited appropriately.

Again, all returns must be approved, with an RMA. This is so that we can process your return as quickly as possible when we get it. If you would like to return an item, please Request an RMA. Please include as much information as possible about the reason for return.

Alternatively, you can also send us a message, or give us a call!