I have searched the FAQ's on this subject, but my symptoms are a bit different. With engine on and running, the generator light is off. Once I shutdown and remove the key, the light remains on and bright. Also, there is power to my radio that seems to be intermittent (on,off,on, off, etc.). If I remove the battery cable from the battery and then re-attach, the generator light goes off. I thought that maybe it was the ignition, until removing and restoring power to the electricsl system shuts the light off. Is this the diode pack on the alternator or is it my regulator? Any ideas?