Test it out of the body like it is in the photo to check that it isn’t any copper shielding shorting out the signal when it’s all squeezed into the cavity (including the jack). If you’not getting anything give some of the wires a bit of a jiggle to see if it’s a dodgy connection.

If still no sound then I’d disconnect the white and blue wires from the volume pot and join them together temporarily to bypass the volume and see if that gives you sound.