ibanez musician 1979

Hi to all here! i need some help, preferably from a MC900 model owner, i have the wiring schematic for the bass but following that doesn’t seem to help me much 🤷🏻‍♂️🤦🏻‍♂ Tried to replace the jack output but doesn’t work, tried to wire the old one the same way (i guess) and didn’t work as...