Tail Lights Issues

[70LS1Lemans]

I recently completed an LS1 swap into a 1970 Lemans Sport Convertible. She runs great and sounds even better. However, I am having issues with the tail lights and rear turn signals. They used to work but have ceased functioning somewhere along the swap. Have checked relays, wires and even the tail lights themselves for grounding and juice. Still have no rear signals. Any ideas on something I am missing?

 

[melsg5]

start from the fuse box and work your way back through the harness

 

[cammerjeff]

Most of the issues I have had with 64-72 A-body Tail lights have been grounding issues. If you have 12 Volts to the Sockets, try hooking up a extra ground wire to the sockets themselves. They are supposed to ground out on the tail lights assemblies themselves with no actual ground wires, but after 40 years those connections seem to be troublesome.
But I did have 1 car that had a bent pin in the fire wall connector, pain in the butt to track down, but on that car only the tail lights did not work, the brake lights, turn signals, and hazard lights did work.