
This is the sequential taillight...

This is the sequential taillight system from Scott Drake Mustang Parts and your favorite Scott Drake dealer. Everything is here to get the job done: three-lamp taillight buckets, 1157 bulbs, wiring harnesses, two sequential electronic turn-signal modules, variable flasher unit, and polycarbonate taillight lenses designed to take the heat of three 1157 bulbs.

The special turn-signal-flasher...

The special turn-signal-flasher module, known as the "electronic variable flasher," plugs into the factory turn-signal-flasher location.

Plug in the flasher and connect...

Plug in the flasher and connect the black ground lead to a suitable ground close by.

1 Marlon Mitchell of Fly-Ford...

1 Marlon Mitchell of Fly-Ford Racing in Chatsworth, California, who assisted us with the sequential taillight installation, removes the factory taillight lenses first.
Pity the Mustang nut who finds himself jealous of corporate-cousin Cougar at Lincoln-Mercury. Cougars got all of those nice luxury items that were well outside the beer-and-pretzel Mustang budget. One example of luxury was the sequential turn signals and brake lights that made the Cougar distinctive. When they were new, these taillights sequenced with an attitude of luxury.
Now Mustang owners don't have to bring up the rear anymore because Scott Drake Mustang Parts has sequential taillamps for classic Mustangs. Available from National Parts Depot, these lights are a lot brighter and more reliable than their vintage Cougar counterparts. Drake has engineered the system from scratch for better performance, without all of the problems associated with vintage factory Cougar sequential taillamps. What makes the Drake system better is solid-state circuitry, devoid of mechanical relays, servos, motors, and cams. It's also virtually invisible. You don't know it's there until it is sequencing your Mustang taillights. It works with precision and is fully adjustable. What's more, you can install it in your '65-'70 Mustang in a couple of hours.
The Scott Drake sequential turn signals have two identical modules designed to sequence the taillamps individually. Each module controls the 1-2-3 rate of each lamp assembly. You can speed up or slow down the 1-2-3 pace by opening up the modules and turning two screws. Each screw is a rheostat (variable resistor) that controls the sequential pace of the three lamps. One of the rheostats controls how long the most inboard lamp is on before the sequencing begins. The other controls how quickly the three lamps sequence.
Each control module gets its power from a source that is live only with the ignition turned on. This means you need to run a separate power lead, protected by a fuse, from the fuse box to the modules in the trunk area. This power lead has to branch out into two leads to each of the modules to keep power going to the modules, which allows normal brake-light operation with the ignition switch in the off position. If you want the emergency flashers to sequence, you'll have to install two flasher modules--one for the turn signals and one for the emergency flashers. These flasher modules replace the stock flashers. If you want emergency flashers that illuminate one bulb on each side, keep the stock emergency flasher.

2 Taillight plugs are disconnected...

2 Taillight plugs are disconnected next. It doesn't matter what type of plug your Mustang has. These leads will be cut to accommodate the sequential turn-signal harness.

3 Taillamp assemblies are...

3 Taillamp assemblies are removed next. Each assembly is retained with four insulated tinnerman's nuts.

4 You'll need these foam...

4 You'll need these foam gaskets that go between the body and taillamp. The new sequential taillamps from Scott Drake Mustang Parts install like this.

You can set up the wire leads...

You can set up the wire leads either before or after you install the lamps.

5 Installed, the sequential...

5 Installed, the sequential taillamps look like this. The three lamps sequence to the left on the left side for a left-turn signal. Likewise, the right side sequences to the right with a right-turn signal. They also sequence when you step on the brake pedal with the ignition turned on. All six lamps are illuminated with the parking lamps or headlamps on.

6 The new lamp is secured...

6 The new lamp is secured the same way, with four insulated tinnerman's nuts.

7 Each taillamp has a specific...

7 Each taillamp has a specific wiring color code because each is different. On both sides, there are three red wires for the parking lamps. The rest of the wires are color-coded in blue, white, and yellow for brake and turn-signal lighting. There are three 1157 lamps per taillamp assembly. Each 1157 lamp has two filaments: one dim and one bright. Parking lamps are the dim filament, while the brake and turn signal lamps are the bright filament.

8 On the left side is a different...

8 On the left side is a different combination of wire color codes, with the same trio of red parking-lamp wires. The brake and turn-signal wires are color-coded to prevent connecting the wires incorrectly. On the left are green, gray, and orange for brake and turn-signal wires.

9 Inside each turn-signal...

9 Inside each turn-signal module, located in the trunk area, are two rheostats that control the sequencing rate. You can speed it up or slow it down.