Reminiscent of the '68 Shelby...
Reminiscent of the '68 Shelby Mustangs, sequential taillights can be easily installed in your '05-'09 Mustang with the SilverHorse Racing kit.
Sequential taillights first appeared on the Ford Thunderbird back in 1965. These taillights flashed in sequence from the inside to the outside when you stepped on the brake or when you used the turn signals. The sequencing added some nice styling and flair to the T-birds and set them apart from the crowd. They next appeared on the Mercury Cougar in 1967. The Shelby Mustangs got the sequential treatment in 1968.
Some debate exists about where the taillights for the Shelby came from. Consensus here at the Modified Mustangs & Fords offices says that the '67 Shelby lights came from the Cougar and the '68 lights came from the Thunderbird. After researching through material at hand, we're left without a definitive answer. Maybe somebody on our forums (forums.modifiedmustangsandfords.com) can answer this question.
The sequential taillight kit...
The sequential taillight kit from SilverHorse Racing (PN S197-801, $149) includes OEM-quality bulb sockets, grommets and wire retainers. The sockets are numbered for installation in the proper order. The reverse light socket is part of the new harness so it is also replaced with the conversion, yet retains the same functionality as before.
Sequential taillights have made a comeback thanks to the aftermarket and Ford's '96 and up taillight design. Ford even realized how popular the sequential taillight conversions are and have now made sequential taillights standard equipment on the '10 Mustang (not to mention the historical slant as well). The modern sequential conversion setups use all electronic components for greater reliability, as opposed to the old mechanical points and rotor setup used back in the '60s.
SilverHorse Racing offers a kit for '05-'09 Mustangs that utilizes OEM sockets and grommets to create a high-quality harness that plugs directly into your stock taillights and chassis wiring, and last through the harshest weather, just like your OE wiring. The harnesses are all inclusive, so nothing else is needed to complete the installation; they simply replace the existing factory taillight harnesses. Installation is easy and just a couple of tools are all you need. The SilverHorse racing kit includes one harness for each side, although they are not specific to one side or the other.
 There are two large retainers...  There are two large retainers that simply twist out. Once they are removed the trunk rear trim panel will lift out of the trunk and give you access to the taillight housing's retaining fasteners. |  Using an 11mm deep socket,...  Using an 11mm deep socket, remove the three nuts holding the taillight housing in place. Although the housing shouldn't fall, hold onto it to be safe. Let's not scratch the paint! |  To remove the trunk trim panel...  To remove the trunk trim panel you'll need to remove the four push-in retainers. Lift the center up and pull the retainer out. If you have to use a screwdriver to lift the center, be gentle so the retainer doesn't get scratched or torn. |
 Disconnect the taillight harness...  Disconnect the taillight harness from the body harness. |  Remove the grommet from the...  Remove the grommet from the body panel. This can be done by hand, but a screwdriver can be used if more force is needed. Be very careful though, as damaging the grommet can allow water or carbon monoxide into the car. Once the grommet is removed, feed the harness through the hole and remove the taillight housing. |  To remove the bulb sockets...  To remove the bulb sockets simply twist counterclockwise and pull straight out. |