0
1st you start up the car. Hook up a voltmeter to the battery, and put a load on the battery as the car is running (have the lights on, radio on, high beam on,...) after you put a load on the battery read the voltmeter. if it goes below 12 the alternator is bad. It souldn't be no more than 14 volts. you can also use the battery gauge but to be 100% sure hook voltmeter to the alternator.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
Can you take off the negative wire on battery to test the alternator?
Yes you can take negative off on all cars and test it if it dies alternator is bad if car keeps running then its good. In older (not computer controlled) cars you can, but on some newer (computer control) cars is not recommended. Some newer cars will turn off even if the alternator is working good. Use a volt meter to test the voltage. Connect it to the battery and it should read a little above 12 volts when its off and 13 to 14 volts when its turn on. If the voltage does not go up, then the alternator is not charging.
Dodge avenger battery dead?
Charge it, replace it,test the alternator,Charge it, replace it,test the alternator,
If a car has a voltage regulator in the alternator does it still work if the cars off?
No, the regulator in the alternator only regulates when the alternator is charging (alternator must be rotating).
How many parts does the charging system have?
The charging system on modern cars has 2 parts. The alternator and battery. On older cars there is also the voyage regulator. On modern cars it is built into the alternator. The electrical system however has many more parts.Alternator, voltage regulator, and alternator belt. The batteries themselves are part of the cranking system, not the charging system.
What would cause no output from an alternator on an 88 monty Carlo besides the alternator itself?
The positive cable between the alternator and the battery has an open circuit or break. There also is a set of wires that plug into the alternator that turns it on when the car is running. Wiring problems here can cause a alternator not to charge on the vehicle but works fine on a test stand. Some cars the alternator light in the dash causes the alternator to kick in when the engine is started. A burned out light in the dash causes the alternator not to charge.
How do test your alternator while in the car and the car will not start?
Car would either have to be running or alternator removed for bench test
Why is your Battery not charging after replacing alternator on 95 ford probe?
Chances are you drained your battery when your alternator failed to maintain your cars regular running functions. You should take the battery to your local auto parts store, they should be able to test it for free.
How do you wire alternator to a battery to test alternator?
run it and then disconnect the negative wire from the battery if alternator dies its bad.
The alternator is considered to be what part of your cars system?
The alternator is part of the electrical system. It is what charges the battery and keeps it charged.
Does your car have an alternator?
Yes, all modern cars have alternators.
What does the alternator light mean on a 2002 vw passat?
That you'r cars alternator don't work properly ! eithter the "fanbelt" is broken or the alternator coal is bad .
How do i test a 24 volt alternator?
with a voltmeter
