Tucson,
I don't know abouit on yer bus but on our MCI's the regulators have an adjustment screw and can be turned up or down to fix this. But on that same note I got one that we've tried to adjust but it doesn't help, but if ya turn on some kinda load marker lights, A/C, headlights anything at all the gen. light goes out! And as I was always told if it ain't broke, don't try to fixit!(come to think of it Dad still tells me that! LOL!)
:) ;) :D ;D :o 8) ::) KNUCKLE ::) 8) :o ;D :D ;) :)