No turn signals
 

64 gto. Complete new America Autowire system, new ididit sterring column. LEDbulbs. Everything works as it should except signal lights. When switched on they only glow dim but if I hook a simple test light to sterring column signal wires they start working as they shoud. I added additional ground wire to taillight housing as a test really no difference. Any ideas?

LED bulbs don't draw enough to heat a standard flasher contacts up, you need a electronic flasher for LED lights because of the reduced draw.

Link: https://www.superbrightleds.com/fl2-...ping%20Adgroup

Did you use a Updated flasher for LED's. Also if the car all together, front signals all hooked up? Try putting old school bulbs in the front turn signal assemblies.
AH crap got beat to the draw. LOL

Led flasher installed. Emergency flashers work great. Brake lights work fine.

Somebody else on here was having same issue and had to swap back to normal bulbs in front, even with LED flasher.