Pel-Job EB150 problems. I need electric schematics

Hello,
My EB150 developed some problems recently.
1. The switch between boom swing and slew acted up. It would switch to boom swing, but not back to slew. A few attempts would switch it. But today it will not switch to boom swing at all.
2. Sometimes it would not start. No sound from the starter solenoid at all. Lowering/raising the armrest seemed to help. I found a ground connection where the screw was loose. Tightening it seemed to fix it, but just for a while. Yesterday nothing resolved...

Pel-Job EB150 problems. I need electric schematics

Pel-Job EB150 problems. I need electric schematics