A friend of mine has a 70 Cougar. It has sequential tail lights. He bought the kit to do LED lights. Talk about a project I could only reach the for way flasher to replace it we got his grandson to get his smaller hand in to get the turn signal flasher. Had to change the bulbs that came with there power units each had there own. When done all was really bright. That all lasted two days and he was back no turn signals or flashers. Got in touch with a Cougar expert in Idaho after about a half hour we figured it was the turn signal switch. YES it was. Come to find out the switch is the same as the Mustang and many other ford products that have just 4 lights that flash. The Cougar has 6 and that added load melts the switch. Ford knew this but I guess they didn't care. Used switch if you can find one is $130. A new switch is $135 made in China and doesn't last. Anyway LED lights can be and are a pain lots of extra things have to be done its not just change the bulbs.