/diy/ - Do It Yourself

I have an old Pincor generator that I'm trying to repair. Originally the problem was a broken connection on the rectifier square, but now after putting in a new rectifier it still doesn't work. I saw these two other things wired to the rectifier and thought they were capacitors, but they ended up being more diodes. One of them had no continuity, but my question is what is the purpose of the extra diodes? Would that faulty diode make the generator not work?