When I have my turn signals on my 72 Roadrunner, and turn on my tail lights my turn signals go away. Any idea's Thanks

May be as simple as checking the bulbs themselves. If that doesn't work, its time to start checking the wiring.

Gotta be more specific. Do they all not work, or just the fronts, or just the rears? If just the front or just the rear, check the ground. IIRC, the rear ground is inside the trunk near the left side marker. Could be loose or corroded. The front has two grounds, IIRC, they may both be loose, or corroded. If neither end works, may be combination of bad grounds at both ends.

More investigation and detail, and we can help you out more.

Good luck,
Marq

This sounds like the classic case of no ground on the sockets

your turn signals work by themselves(both sides)correctly & the taillights work when you pull them out to the first click but at that point the turn signals stop functioning on either side? Since they are fed by seperate 12V inputs I agree that bad ground(s)& cleaning sockets would be a good 1st step.