I have a 1980s Ibanez Roadstar RB850 that I purchased new. It was refinished back in the late 90s. I’m in the process of doing another finish and when I opened up the control cavity I was shocked at the wiring and how crappy the job was done by the last tech that worked on it. The volume and tone controls have push switches. I believe they switch the humbuckers from single to dual coil. They do not work. Does anyone have any idea where I might find a wiring diagram to put this back into original condition? Thanks in advance!