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Is it the battery or the alternator that is bad on a zx7r that shows 11.77 volts while idling at 3000?
Wiki User
∙ 16y ago
Unless the battery is shorted or sulfated and will not take or hold a charge, most likely the alternator is bad
Wiki User
∙ 16y ago
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If the ignition is off and the Battery shows 11.5 volts when the engine is running shows 13.6 Volts?
It shows that your battery is in workable condition and your alternator is charging as it should.
Can a bad alternator cause a battery to be unchargable?
Yes, it can ruin the battery by overcharging it. If you are reading between 13.5 to 15.5 volts at the battery with the engine idling then more than likely the alternator is good and you battery has a dead cell. A fully charged battery will read 12.6 volts with the engine not running.
How you can know if your alternator is charging properly?
Check the voltage at the battery posts with the engine idling. It should read from 13.5 to 15.5 volts.
Why new battery and alternator won't hold a charge when car is running?
The alternator does not hold a charge. It charges the battery. If it will not charge the battery then either the alternator is defective, battery is defective, or the connections are corroded or loose. You should read 13.5 to 15.5 volts at the battery with the engine idling. Check it with a DC volt meter. If you get less the alternator is defective. If you get much more the voltage regulator is defective.
What is battery volts high?
Alternator is sending to much volts to battery. Suppose to turn itself off when battery gets to around 13 volts. May need new alternator.
Is 13 volts on a battery mean your alternator is bad?
Not necessarily. There are a lot of factors that can keep you from reading 14 volts at the battery, such as corrosion in the cable from the alternator to the battery.
Does the alternator charge your battery when the car is idling?
Yes and no. Yes: The alternator will charge the battery any time the engine is running (even at idle) if the battery's voltage is below the threshold (usually around 12 volts) so that the voltage regulator triggers the alternator to generate power (around 14 volts) until the battery is charged up. No: If there is not enough consumption of power, the battery may be charged enough and the voltage regulator will not trigger power generation.
Can the alternator put out to many volts and drain the battery?
It can put out too many volts and destroy the battery but not drain it. The alternator should put out between 13.5 to 16 volts.
How can you know if your alternator is bad?
Check the voltage output at the battery posts with a multimeter set to DC voltage in the 20 volt range engine idling. You should get from 13.5 to 16 volts. Any more or less and the alternator is bad.
Can you eliminate alternator from car?
you need the alternator to charge the battery with no alternator when the battery drops to about 10 volts car will not run at all.
Why is your check charging system light coming on after you changed your alternator?
Either the alternator you installed is defective or you wired it incorrectly. Check the voltage at the battery with the engine idling. You should read from 13.5 to 15.5 volts with a digital DC volt meter.
What is high volt?
Alternator is sending to much volts to battery. Suppose to turn itself off when battery gets to around 13 volts. May need new alternator.
