Easy fix for anyone who still has there older seqential motor and directional relay set-up. I didn't use this on my car but gave it to my brother to use on his "68 XR-7 and it fixed his flasher problem.

I got the emergency flasher in and immediately went to install it. After 5 minutes, I had sequencing tail lights again. It may not look exactly right, but it is under the filler panel and trunk mat anyway.