0
You could take it to an auto parts retailer, such as auto zone, Checker Auto, Kragen Auto and have them run an electrical system diagnostic test. That will tell you just about everything you'd want to know.
BUT!
If you have a volt meter that's fairly accurate you could figure it out yourself with a high degree of confidence.
* Start the engine. If the battery is dead you may need to jump-start the vehicle from the battery of another car. * Remove the jumper cables, if you had to jump start it. * have a friend run the engine up to about 1000 RMP and try to hold it fairly steady. * Use your voltmeter to check the battery voltage. It should be about 13.5 and can be as much as 14. If the voltage is down around 12 or less, it's probably a bad alternator. * If the voltage is up, start turning everything on while you watch the voltage. It MAY drop a little, but shouldn't go below 13. If the alternator can't provide enough power to operate the accessories, you may have some bad diodes in which case the alternator would still be considered "bad".
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
What does the battery warning light mean on a 99 Sunfire?
Have your battery tested first, if it is good most likely it is a bad alternator, have that tested as well
Where is the location of the coolant temperature sensor for the cooling fans on a 1997 Pontiac Sunfire?
On my 99 sunfire it is directly to the back/side of the alternator; very easy to spot
Disable the anti theft on 99 sunfire?
how do i disable my anti theft on my 99 sunfire
How do you know when the balance shafts need to be adjusted on 99 2.4L sunfire?
No way to adjust them
Where is the cooling switch sensor located on a 1998 Pontiac sunfire 2.4l?
actually it's called a temperature senson and on my 99 sunfire 2.2 it's right behind the alternator with a 2 wire connector cost around 15.00 if you unplug it with the motor running the fan will come on actually it's called a temperature sensor and on my 99 sunfire 2.2 it's right behind the alternator with a 2 wire connector cost around 15.00 if you unplug it with the motor running the fan will come on
Can you use a 2.4 cavalier engine in a Pontiac Sunfire gt?
you can as long as it is withing certain years 1996-1999 cavalier engine will work in a 96-99 sunfire and a 99-02 cav engine will fit a 99-02 sunfire
Your 99 dodge caravan will not hold a charge on the battery but the alternator says it is good?
bad pcm regulator
Is the bcm located in the center console in a 99 sunfire?
The bcm for a 99 Sunfire should be under the dash. It is on the drivers side near the kick panel.
How do you know the size of your door speakers on a 99 sunfire without taking off the door panel?
5 1/4
Is the hood from a 98 pontiac sunfire gt compatible with the hood of a 99 pontiac sunfire coupe?
Yes!
How do you know if you got a bad starter on 99 Plymouth voyager van?
a sound that goes click,click,click,click,then maybe a start. and that's if you know you have a good battery good alternator and fuses are all good just to keep it safe you know that goes
How do you replace alternator fuse?
Were do you find alternator fuse on a f150 99
