13.5 to 16 volts.
From the alternator to the battery should be 14v
Put a new alternator on it or tear the old alternator apart and replace the voltage regulator in it.
If you are asking what the normal ouptput voltage of a car's alternator/generator is, it is 13.5-14.5 volts.
change alternator
Automotive Alternator Output VoltagesWith a properly operating alternator, AND electrical system, a voltage output range of 13.5 Volts to 16 Volts is considered acceptable.Just the alternator puts out around 120 vac, but most newer alternators include a built in rectifier that limits voltage output to between 13.5 and 15.5 volts DC depending on speed.
It's inside the alternator, most people just replace the alternator if it isn't charging but you can take the alternator apart if you know how and put in a new voltage regulator for about $15.
The brake lights come on. The alternator should maintain voltage (14.2) unless the alternator is failing or the battery is nearing end of life.
The new alternator probably has a faulty voltage regulator.
go have your alternator tested. when they start to go out the alternator will create alot of drag on the engine but then work fine and the engine wont have the drag but the alternator wont put out the correct amount of amperage and the votage will drop increasingly
Assuming you are asking about the voltage regulator, the voltage regulator regulates the voltage being put out by the alternator or generator so not to overcharge or undercharge the battery and maintain the correct voltage for the electrical system. In 1964, the Lincoln voltage regulator was externally mounted. In later years it became integral with the alternator.
bad voltage regulator is a possibility
Most vehicle manufacturers now put the regulator inside the alternator.