sequential tailight problem

Hi all Cougars
Ive got a 1967 base Cougar
when i select turn signal i get the front signal and only the middle light only to flash in the rear, same on both sides, either
way. on my dash both indicators try to flash then just illuminate dimly and i can hear them trying to blink. From what I’ve
gathered sounds like the k10 relay has failed, Im wondering if its actually the relay that has failed, or did i do something
under the dash to make it not get power. Btw i have been under the dash trying to get the hand brake light to work, any
help would be great help. This is my second Cougar and i will never rid my self of it. Also it has the original analog sequential
system as of now, im going to order the solid state system. Thanks

Look through this thread: https://www.classiccougarcommunity.com/forum/viewtopic.php?f=3&t=2518&hilit=sequential