Help Starter key won't start engine

Could be several things. We know "from the relay down" is OK because you jumpered the relay. You say 69, so no clutch safety switch, but is this stick or auto

If stick, the relay must be grounded, OR if it has a four terminal relay (two pushon terminals) one of them must be grounded.

Otherwise, check the yellow "start" wire, see if you have power. If it's an auto, you will have two pushon terminals. The second one goes down to the transmission neutral safety

Try holding the key to "start" and pulling the shifter through P R N as you hold the key.

If no go, make sure that terminal is getting grounded, or temporarily jumper it to ground. Be careful, it will start "in any gear"