2005-2009 Mustang Sequential Tail Light Solutions

What are your sequential tail light options for 2005-2009 Mustangs?

Unlike the 2010 to present Mustangs, where you have few sequencing options for your Mustang’s tail lights, for the 2005 – 2009 Mustang there are lots of options.  Because sequential tail lights for the Mustang have become so popular, numerous vendors now offer solutions, albeit some better than others.

To ‘Plug-n-Play’ or not

By far the most popular options are the plug-n-play options that exist.  Plug-n-play refers to how you simply have to unplug the original tail light harnesses that come standard on your Mustang,  and replace them by plugging in your newly purchased sequential harnesses.  You do not have to modify anything but cutting, splicing or crimping.  You are however, required to move the tail light bulbs, but this is also really just a unplugging  and then plugging in operation.

Plug-n-play installations take only a few very common tools and about 25-30 minutes of your time.  The installation is simple and straight forward with little chance of creating problems.  If you save your old harnesses you can easily restore your Mustang to original stock condition.  This action is often taken by owners just prior to selling their Mustangs.  They resale their used, yet still functioning, sequential tail light harnesses on eBay or Craigslist, usually for about 80-90% of what they paid for them.

2005-2009 Mustang sequential tail light replacement harnesses that you simply plug inWe recommend the plug-n-play option for the majority of Mustang owners because it simple, easy and allows returning to stock condition.

For the Do-it-your-self person, you can go with the ‘Splice in kit’ option

A less popular option, that can save you some money, is the sequential tail light splice in kit.  Instead of purchasing complete replacement harnesses, you instead purchase a kit containing some wire, connectors, microprocessor boards and hopefully good instructions.  Instead of simply unplugging and plugging in fully ready to go harnesses, you cut and splice the components you received in the kit, into your existing tail light harnesses.

The only advantage to a splice kit is that it can save you some money, that is if everything goes well.  The potential is there to damage your Mustangs original harness or the components you purchased in the kit.  If either happens you can spend extra time and money in rectifying the problem, and watching all the savings you thought you were to enjoy disappear.

The splice kit can end up costing you more in the long run when you sale your Mustang.  It’s not an easy task to resale a used splice kit on eBay or Craigslist, when compared to a complete plug-n-play harness set.  When the time comes to sell their Mustang, numerous owners like to pull out their sequential tail light harnesses and resale them to make a few extra bucks, especially if they are trading in their Mustang.  Dealers don’t want to give you the extra money for them.

We recommend the splice kit option only to those that are pretty handy and extremely tight on money.

Do you want to sequence all tail light actions?

2008 Shelby Mustang with sequential tail lights - turn signal in actionWhile most sequential tail light solutions sequence all tail light functions, including turn signals, brake lights and hazard lights, some only sequence the turn signals.  For this reason you need to decide what tail light functions you want sequenced.

The typical tail light actions sequenced on 2005-2009 Mustangs:

  • Turn Signals
  • Brake Lights
  • Hazard Lights

2008 Shelby Mustang with sequential tail lights in useAt least one vendor, that provides a sequential tail light solution that only sequences the turn signals, uses a marketing ploy that you should be aware of.  This vendor leads people to believe that sequencing the brake light function is illegal, which it is not.  The vendor never says it is illegal, but simply suggests it is.

The fact is that the DOT regulations state that a vehicle’s brake lights must ‘burn steady’ when lit.  All sequential tail lights solutions that we are aware of do so.  We talked with one vendor that has sold many thousands of sequential tail light harnesses for Mustangs and has yet to hear of a single case where an individual was ever pulled over by the police due to their sequencing brake lights.

2008 Shelby Mustang with sequential tail lights - hazard lightsl in actionWe believe that a case can be made that sequencing brake lights can be more effective at getting the attention of drivers, due to their motion, than standard brake lights.  If this is so, a conclusion could be drawn that sequential brake lights are, at a minimum, as safe as and possibly even safer than non-sequenced brake lights.

Don’t select your sequential tail light solution based on false information

Bottom line, don’t select your sequential tail light option based on false information that is designed to generate fear or push you to a single vendor’s product, but on what look you want for your Mustang.  If you like the sequential tail light look, and are going to spend money to add it to your Mustang, why not have all your tail light functions sequence?  Think about how much more you use the brake pedal than your turn signals.  Then think about how much more attention you will enjoy with your brake lights sequencing once each time you press your brake pedal.

If you haven’t  got them, get them

Sequential tail lights are perhaps the most popular add-on for late model Mustang owners.  They are inexpensive, easy to install, and provide years of enjoyment as you attract attention to your beloved Mustang.  Sequential tail lights look just as good on a V6, GT or Shelby Mustang.  If you haven’t got them on your Mustang, Monzter Automotive is a great place to look for your sequential solution.

Here is a link to Monzter Automotive’s online store where you can find some of, if not the best, Mustang sequential tail light solutions available.

Monzter Automotive graciously provided images and videos to enable us to illustrate this article.