Hey Nico if you haven't fixed the problem, I had the same issue with my 95 Pathy. It turned out to be a bad wire link just after the Positive battery terminal.
I took it apart and took an old power cord of the same gauge, spread the terminal ends, rewired & soldered it and put it back in. I started right up.
If someone can tell me how to post pictures here. I'll post a picture of what it looks like and where it is.
Hope that helps, Best Wishes n Blessings. Keith Noneya