[koates]

All the above answers are good but possibly to complicated for you to workout why the generator is not charging. Do this test, disconnect both wires off the cutout terminals and leave them free. Start the engine and let idle. Connect the two wires together, you may get a small spark here. Rev the engine up a bit and note if the ammeter is charging or not. If not charging then the generator is most likely at fault. Make sure you disconnect the two cut out wires apart from each other after the test. I suggest that if you know nothing about these generators then you take it to an auto electrician for testing or repair. Regards, Kevin.