Click/Tap to View PDF What would a classic Cougar be without functioning sequential taillights? Frustrating, that’s what. Classic Cougar Community member coachJack has come to the rescue with his thorough guide “Everything You Wanted To Know About the ’67 Cougar Sequential Taillights.” According to coachJack, he started with Steve Citrone’s “Sequential Signals of the 67/68 Cougar,” which provides comprehensive information about the system. Next, he added the “Sequential Turn Signal And Emergency Flasher Systems” which contains essential information, working diagrams, wiring diagrams and a troubleshooting flowchart.