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What does it mean when alternator voltage reading starts at 14.5 then drops to 12.8?
Wiki User
∙ 11y ago
I would suspect that the alternator is failing. Have it load tested at your local auto-parts store.
Wiki User
∙ 11y ago
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Why do your lights dim when your RPM decreases?
Because the voltage drops. Depending on what is the problem changing the battery or alternator will help.
Why does the voltage drop when you turn lights on in a 1966 dodge?
In all probability you have a bad battery or a loose connection. If the voltage drops with the motor running, you probably have a bad alternator (or generator) or regulator.
What is the voltage output for an alternator belonging to a Mercury Sable 93 suppose to be?
i would think it should put out from 12 to 15 volts.you will need to check output also with lights on an if it drops in voltage you probably have a bad alternator,most auto parts stores can test the system for you.
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Theory of an alternator. To control the voltage the alternator turns of and on very very fast, this is called pulse width modulation. Wiki it for more background. This means that the voltage spikes very very high for an instant and drops to almost zero before it turn on again. To keep working, and it will try, it burns itself out by going to to high a voltage to often.
Why does the battery light go on and off in my 2002 Monte Carlo. Every time the battery light comes on the voltage drops. When the light goes out the voltage comes back. What could be wrong?
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt.
Will a truck miss out while driving because of a bad alternator or battery?
If the voltage supplied DROPS BELOW WHAT IS REQUIRED TO PROPERLY RUN THE IGNITION, YES IT WILL MISS AND QUIT.
Are resistor drops the voltage or current?
Are resistor drops the voltage or current? ANSWER: The voltage DROP is a way to imply that the voltage no matter of the value is what it must be whether it is measured or calculated
The voltage across a short circuit is equal to?
zero? the supply voltage? the supply voltage minus the individual coltage drops? the sum of the individual voltage drops? which one?
Is there an alternator relay on a 2000 2.5t.d jeep Cherokee if so where is itIT CHARGES FOR 2 MINS WHEN RUNNING THEN VOLT METER SUDDENLY DROPS OFF?
Sounds to me that more than likely your alternator's voltage regulator is bad, i.e., a new alternator. Check out your alternator at Autozone or Advance Auto and see if it holds up to specs.
1986 300zx computer where do i find it i was told it wasmy computer my car won't charge or run the battery gage goes from 14 to 12 then drops to nothin?
Check the charging system first. With the car running use a multimeter to see output of the alternator at the battery. Should be 13.5 + volts if the battery is not at 100% charge. If the guage is right and the voltage drops off check to be sure you have power to the back of the alternator. It's possible you may have a alternator problem or if it's externally regulated(I think it might be) a voltage regulator problem.
What does it mean when battery light sporadically comes on in a 2009 jeep wrangler?
Usually that means either, The battery has a dead cell and needs changing, The battery is being over taxed and is experiencing large voltage drops, or the alternator is malfunctioning. The alternator could be charging the battery and then not charging for a long period of time. This will cause the battery to get low pinging the warning light then later shutting off when the alternator starts charging again. There are many auto part stores you can take it to, for a free test of the battery and alternator.
Replaced alternator 1997 jeep wrangler when you start it up and run for about 5 min the voltmeter drops to zero and the check gauges light comes on also getting code 12 and 47?
Voltage regulator is in computer. Check Alternator, then check computer
