There must be too much amperage going through the wire. Either it's the wrong gauge wire (unlikely), or there is a problem where the charging system is putting out too many volts/amps. Check it with a multimeter.
run it and then disconnect the negative wire from the battery if alternator dies its bad.
ALternator fuses, if equipped may be on the battery post, in a fuse box, or in the wire going from the battery to the alternator.
the positive wire that recharges the battery after being drained from the starter
alternator, or a wire to alternator loose
This wire allows the alternator to keep the battery charged.
Usually when the battery light comes on its the Alternator, or a bad wire from Alternator to battery, but id check Alternator first.
Yes, if it shorts to ground internally.
Voltage regulator or loose wire.
Indirectly. The positive cable on the battery is hooked to the starter. The other wire on the starter post goes up to the alternator.
usualy if the alternator is not defective then its the battery. you should start by cleaning the battery post. then you could check the terminal wire that runs from the battery post to the alternator. if thats not it you should check the ground on the alternator.
The third wire is for whats called the sensing or pre-excitation circuit. This wire supplies the initial current from the battery to the alternator's field coil that starts the buildup of the magnetic field that allows the alternator to start producing current.
in a series battery, alternator, ignition