My brother has a 92 3000GT VR4. On his way to my house, his ABS light came on. When he turned the car off, he could hear a humm/buzzing noise from the engine. It was coming from a brass box with connecting brake lines and next to the air filter. First he tried removing the ABS fuse but that didn't work. He had to pull the battery cable to get the noise to stop. Anyone have any suggestions what's gone wrong and what to do to fix it? Thanks, Monica