Charging system road rage

Well first off, do you own a voltmeter and a test light?
The alternator itself is very simple to check.
One small wire has power from ignition, other finds its way to ground through voltage regulator.
Third,large wire makes its way to battery indirectly.
So,both small wires disconnected,key one,one will light the test light.
Connect that wire back to alternator.
Start car with voltmeter connected to battery.
Ground other terminal and watch voltmeter. It should increase.
Perform this and get back to us. No point going through anything else until you establish if alternator is good.