One obvious symptom is that your battery will not charge while driving.
A bad belt, a bad regulator in the alternator or bad brushes in the alternator.
Older vehicle (non-computer, uses points): With engine running, remove either lead from the battery (taking it out of the circut). If the engine quits, it needs a battery, if not, do diagnostics on the alternator.
Your local autoparts store can test the electrical system of your vehicle to determine what is at fault.
You are having a problem with the charging system. It could be a failing alternator. Have your local auto parts store test the charging system to determine what the problem is for free. Don't ignore it, you may get stuck.
bad alternator, bad voltage regulator, bad battery, bad connections.
The alternator is belt driven and so is the water pump but that is where the correlation ends. There is no way a bad alternator could cause a water pump to go bad unless the alternator pulley was warped. Then there is a small chance.
alternator is bad
Spark Plugs do not affect your alternator. As long as your engine is running then it should be charging unless your alternator is bad
a bad ground wire can ruin an alternator by not completing the circuit
A bad alternator will not give proper power to the vehicle. Dim lights, buzz in the stereo or a dead battery could all be causes of a bad alternator.
bad alternator cable/corrosion bad battery
it can be caused by a bad alternator