Some include the alternator - battery - starter circuit. Probably
the headlight switch, the domelight, the clock. There is a bypass
of the ignition ballast on the starter that could be shorted.
If your amp light stays on with the ignition off, that indicates
the alternator's isolation diode is shorted (however that will not
indicate if the fuse that operates the turn signal is out, and in
fact your alternator may not charge if that fuse is out because
current to the amp light is necessary to begin excitation of the
alternator.)
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George Downs, Bartlesville, Oklahoma, Central US