weird buzzing noise

Hey guys. I had a question that maybe someone out there can help with. So my 81 280zx has been out of commission for a long while now and I have just got it going again. But the problem is that when I rev the engine above about 2500rpm somewhere on the passanger side I hear a buzzing noise kick on. It sounds like its some sort of alarm. Also at the same time I get the break light, the fuel light and door light all turn on at the same time. I buzzing stays on except for when I am in reverse, but comes back when I shift to any other gear including neutral. Anybody know what this means?