2005+ Mustang Sequential Tail Lights Kit Installation Guide

The below installation instructions work for the following products:

• Mustang Sequential Taillight Kit 2005+

Here at American Muscle, we're all about DIY (do it yourself). Of course, there's nothing wrong with seeking out a little bit of tech help prior to taking on an installation on your own. Our Mustang installation guides will provide valuable instructions and hopefully answer any how-to questions that you may have along the way.

(Right Click, Save Target As)

Tools needed:

• 1/4” Drive 11mm Wrench or Deep Well Socket & Ratchet
• Small Flathead Screwdriver
• T-30 Torx Bit & Driver (requirement depends on model Mustang)

Installation:

1. Start by opening the trunk of your Mustang. Remove any large objects from your trunk, so that you have unobstructed access to the trim area of the taillights.



2. Remove the four center pin lock retainers attaching the trim around the latch of the trunk. These can be removed by using a flathead screwdriver to pop the center of the pin up, which then allows you to remove the retainer. Once all four retainers have been removed, use the T-30 torx bit & driver (required for some models) to remove the two screws on either side of the upper portion of the trim. Once both screws are out, remove the trim and set it aside in a safe place.



3. Remove the three 11 mm nuts on the back of each light. Disconnect the wiring harness and push the grommet and harness out of the vehicle. The taillight housing and wiring harness should be removed as one piece. It very is important to protect the Lens before continuing this installation! Note: It is best to work on one side at a time, to reduce the chance of losing hardware or avoid confusion during installation.



4. Remove the sockets from the housing by twisting them. Now remove the Bulbs from the sockets and insert them directly into the new sequential harness. From there, install the new harness into the taillight housing. Note: Mustang sequential tail lights harness sockets are labeled 1, 2, and 3. Socket 1 is for the innermost taillight bulb, socket 2 is for the middle taillight bulb, and socket 3 is for the outermost taillight bulb.



5. Install each Light with new harnesses attached into their original location. Install using only one nut until a correct and working installation has been confirmed. Plug the sequential harness into the vehicle harness. Repeat this step for both sides before continuing. Note: Before testing your turn signals, be sure that both sequential harnesses are securely plugged into the vehicle’s harness. If not, the vehicle’s computer will cause a fault and the turn signals will not function properly. If this occurs, simply disconnect the negative battery cable, which will reset the computer



6. Now that you have confirmed that your Mustang sequential taillights are working, install the remaining 11 mm nuts on the back of the housing of each taillight. Make sure the rubber grommet is seated correctly in its hole to prevent water from entering into the trunk area. Reinstall all of the remaining interior trim to complete installation.

Installation instructions provided by AmericanMuscle customer Mike DiCanzio