Starter clicks using the key, engine starts by jumpering the relay

Hey guys, when I turn the ignition key, the starter clicks as if the battery is dead. But when I jumper the starter relay, the car starts. I’ve replaced the ignition switch, because before it wouldn’t start at all using the key.

I will be looking up a wiring diagram to see if I can trace the problem, but I was curious if anyone has experienced this. It’s a ‘74 Barracuda, 440 six barrel with a 727.