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I recommend getting a cheap multimeter. With the car running put the leads on the battery terminals ( with the meter set on 20 DC volts) and check the voltage. If you have 14-16 volts your alternator is working. If you have 12 or less volts your alternator is not working. This procedure requires you to have the car running so you might need a boost to try it.

Also check the voltage at the battery with the engine not running. You should read 12.6 volts on a fully charged battery. 12.4 and it is 75% charged. 12.2 volts and it is 50%. 12.0 volts and it is 25% charged. If you find the battery is too low, then put it on a charger and see if it will take a charge. If it will not, the battery is defective.

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Q: How do you know if your battery or the starter is bad?
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Your 2002 jeep gc will not start it makes a click sound when key is turned but no crank the battery is good and the car has been running great to this point could it be the map sensor or the starter?

It can be a bad starter, but it can be a corroded battery cable. If you know the battery and cables are good, remove the starter and have it tested at most auto parts stores.It can be a bad starter, but it can be a corroded battery cable. If you know the battery and cables are good, remove the starter and have it tested at most auto parts stores.


What would cause a positive battery cable to burn up?

bad starter or bad connection to starter or bad ground on battery or starter


Clicking and will not start?

Could be the battery is drained or bad. Could be battery connections at battery and or starter are dirty and or loose. Could be starter solenoid is bad. Could be starter is bad.


Will a bad battery drain your starter?

Your starter is incapable of being drained. It is an electric motor. However a bad starter can drain your battery


What causes a 1993 buick lesabre not to start after replacing the starter?

My suggestion is to make sure that you have a good connection between your starter and your battery. Is the starter even functioning? If not, it is probably a bad starter, a bad battery, a bad fusible link for the starter, a blown fuse, or just a bad connection. My suggestion is to make sure that you have a good connection between your starter and your battery. Is the starter even functioning? If not, it is probably a bad starter, a bad battery, a bad fusible link for the starter, a blown fuse, or just a bad connection.


Why Ford truck does not start after turning off engine?

The starter could be bad. Or the battery. The starter could be bad. Or the battery.


Will vw cabrio jump start with a bad starter?

If the starter is bad no. Check battery, starter and solenoid to be sure which is bad.


How do you know if your starter is going bad?

One indication that the starter is going bad in your vehicle is if the vehicle won't start but the battery is full of life. When the starter is the reason, a very audible click will be heard.


What will would stop a car not start but makes a clicking sound at the starter motor?

dead battery bad starter solenoid bad starter loose or corroded battery or starter cables


Why won't the engine turn over when you try to start your 1989 Corolla?

Dead battery? Bad starter? Bad/dirty connections on battery cables? If you know the battery is good, you have to listen when the key is turned. if there is an audible "click" when you turn the key its mostlikely the starter.


Why Ignition clicks but wont start?

Could be,low battery, loose or dirty battery connections, starter is bad, starter solenoid is bad, neutral safety switch bad or out of adjustment, starter relay is bad,


Why would a 1999 Passport not start?

Dead battery? Loose or corroded battery cables? Bad starter? Bad starter solenoid? Bad neutral Switch?