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·   2-year factory warranty.

·   Designed, Manufactured in the USA.

·   Solid state, noise free, no moving parts like the old motor driven ones.

·   Fully enclosed for protection against the elements.

·   This new circuit uses only about ¼ the current than the originals.

·   All circuitry is permanently lead free soldered for reliability. No sockets or plug in’s.

·   Built with state of the art Mosfet power transistors with clamping protection.

·   Dead short safety protection. Units shut off if outputs are shorted.

·   Heavy-duty circuit protection to protect its own internal circuits for reliability.

·   Consistently updated to keep current on the latest available electronic parts.

·   Designed and kept updated by an experienced Electronic Engineer.

·   Proven Design. Thousands in operation.

·   The 69 and up sequencers come with 8 Amp 200 Volt rated transistors as apposed to the original 3 amp 50 volt, making them 4 times more reliable than ford originals.


Easy Application

·   Easily installed. Mounts in original position.

·   No modifications necessary. Plug and play ready.

·   Combined systems available to replace many individual parts in one unit.

·   Connectors and Wires are color-coded and are exact duplicate of original parts.

·   Comes with Easy to read instructions and troubleshooting guides.

1966 T-Bird

Helpful Hints                    SCROLL DOWN FOR LISTINGS

Ford made two different sequencing systems for the 1966 T-Bird. The first system was put in 1966 T-Birds made before 11/17/1965. The second system was put in 1966 T-Birds made after 11/17/1965. Important See Note below. 


If you are not sure what part is causing the problem we have a FREE troubleshooting guide. It is located on the lower left hand side of this page under Store Pages.


All parts we sell are aftermarket replacement parts manufactured by Cougars Unlimited. They are made to plug and play into the original mounting and wiring harness. They are new and come with a 2 year warranty plus 2 from us. 


Combined Sequential Turn Signal kits (Recommended) (Replaces all individual parts)

Sequencing systems are complicated so to make it easier Cougars Unlimited has combined all the parts found on the rubber pad in the trunk of your car into one unit. T2 or T3.


T2)  C5SZ-13A366-AS Early

1966 T-Birds made before 11/17/1965

Replaces   Sequencer Flasher   Stop Lamp Relay    Directional Relay 

Replace this                                                       With this



T1-T2-orig    T1-T2

Original                                                                              Replacement

Note: Rubber pad is not included in purchase.  


T3)  C6SZ-13A366-AS Late

1966 T-Bird made after 11/17/1965

Replaces    Sequencer Flasher    Stop Lamp Relay    Directional Relay

Replace this                                                   With this

T3-orig    T3

Original                                                                                 Replacement

Note: Rubber pad is not included in purchase. 


NOTE: The difference between the 1966 T-Bird Early model and the 1966 T-Bird Late model is the wiring harness on the brake light relay. The brake light relay is the part mounted on the rubber pad in-between the sequencer and directional relay. Ford used the 1965 parts in the 1966 Early Thunderbird production. The stop lamp relay, connector and harness were changed while the sequencer and directional relay did not. The change took place during the 1966 model production year on 11/17/1965.

The date code on your car and the date code charts are often incorrect. Before you purchase you must determine which unit you need. Remove the rubber pad in the trunk with all the parts still on it and look at the stop lamp relay and it’s harness. Check to see if the stop lamp relay has a three prong or a four-prong connector and if it has three or four wires, also if the stop lamp relay has a short 8in removable harness. This 8in harness can be unplugged directly from the relay and the main harness to the car.


If there are three wires, a three-prong plug and has the 8-inch removable harness then it is the early model and you need to purchase the T2) C5SZ-13A366-AS 1966 EARLY Manufactured before 11/17/1965


If there are four wires with a flat four-prong plug, and an 8-inch harness that does not unplug from the relay itself then you have a late model and you need to purchase the T3) C6SZ-13A366-AS 1966 LATE Manufactured after 11/16/1965





Double your warranty!  2 year factory warranty + 2 year extended warranty from us = 4 year warranty only when you buy from us.


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