Greg Clark
November 1, 2009

Tech | Taillight Upgrade
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 ( can answer this question.

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.

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