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Toyota amp seina

Amperage output

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Charging current usually lies between 8 amps to 25 amps depending on the load which is being put on the battery. Immediately after cranking the engine the battery is charged at high rate even up to 25 - 30 amps, which comes down to almost 7 - 15 amps after the engine is run for few minutes. More the load on battery higher the current and lesser the load lower will be the charging current to charge the battery.

Posted on Dec 06, 2013

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Paul, bought alternator at o'reilys Said 2 sizes took 1 with more amp output. put on on Tues.and gages crazy. new battery today should exchange 4 less amps?


There no reason why the bigger alternator drive the gauge crazy in that case the bigger the better you can drive more electric conponent

Apr 11, 2015 | 2005 Ford F-150

1 Answer

How to make 12v DC power supply to power my winch


use a 12v car battery and a small battery charger... a winch draws alot of amps when in use... so you need the battery to supply the amperage ... 12v power supplies are low amperage output supplies... so will not work (inexpensively).

Mar 23, 2013 | Cars & Trucks

1 Answer

I replaced alternator on 2002 camry. now when i apply brakes or use power windows with headlighs on, lights dim and then brighten back up when i take foot off brake. what is the problem? Alternator checked...


Hello. Welcome to FixYa. Please allow us to assist you.

We are sorry that you are experiencing issues with your Camry.

Personally, I am inclined to believe that your replacement alternator is not designed to provide sufficient amperage output with your electrical draw/usage. You probably have a 60-amp output alternator now installed. More often than not, the lower amperage alternator will not develop overcome a constant draw, like headlights, rear defroster, etc.
The dim and the return is the voltage regulator increasing the voltage.

What you can do:
I would recommend exchanging your current alternator with a 90 amp output alternator to cure this issue.

Thanks for choosing FixYa for assistance today.

Oct 27, 2010 | 2002 Toyota Camry

1 Answer

Alternator how many amps output What alternator do i have to buy


Bosch High Output Alternators deliver amperage output up to 200 amps

Sep 14, 2010 | 2003 Volkswagen Jetta TDI

1 Answer

How to diagnose charging system red warning light on


There seems to be a no charge state in this case. I recommend checking the charging system. Flow the procedure below to isolate this issue.

Wear protective eye wear and clothing and remove all jewelry when checking your battery and charging system. Jewelry is a good conductor of electricity and is not recommended. Most batteries wear out every 3 to 5 years and need to be replaced. Always replace your battery with an equal replacement battery to assure proper operation. Automotive batteries have a +positive terminal (red), - negative terminal (black). Electricity is stored in the battery and then supplied to the vehicle when the engine is not running. While the engine is running the vehicles alternator charges the battery for future use.(((-Warning-))) Never disconnect the battery while the engine is running. If the battery cable is disconnected from the battery a spark can be generated which can cause the battery to explode or a major electrical malfunction to occur.

To check a battery surface voltage, remove the positive terminal protective cover. Connect the +positive side meter lead (red) to the positive side battery terminal. Connect the - negative (black) side meter lead to the negative battery terminal. With the vehicle not running and the car sitting over night the battery voltage should be between 12.5 and 12.8 volts.(You will need to use a voltmeter for this testing procedure)

The alternator is rotated by a drive belt driven by the vehicles engine while it is running. Electrical voltage and amperage are generated to recharge the battery and supply voltage to the electrical system of the car. The alternator is held in place with mounting bolts. There is a main electrical wire on the rear of the alternator that supplies voltage to a main voltage junction box. If your alternator is not charging properly, your battery will slowly drain down from operating all the electrical systems in your car and stop the car from running.(most non charge states will be the cause of a loose belt or a low tension rate, due to a mis-adjusted alternator. make sure you have enough tension in the belt for full rotation of the alt pulley)

Next, you will need to check the alternators output with the Amp meter.

Testing the amperage output of the alternator is good for measuring the amount (not the level) of voltage the alternator can produce. This test can be tricky because if the alternator is weak it can still show it as producing amperage. Which is good, but if the voltage is low, it will still allow the battery to go dead. To check the amperage output of an alternator an amp meter is needed. Once the meter is connected start the engine. Next turn on all electrical accessories and raise the engine idle to about 1200 RPM. The alternator should output the max amperage it was designed to produce. Example: a 90 amp alternator should output about 88 amps.


  • NOTE_ Alternator's cannot sustain maximum output for long periods of time. If the alternator is forced to operate at maximum output it will overheat and fail. An alternator is designed to operate at max amperage output only for a reasonable amount of time.

  • NOTE_Connect the voltage meter lead the same way you would in a battery static voltage check, Start engine (do not drive) at engine idle the voltage should be between 13.6 to 14.3 volts. If not the alternator may need to be replaced.

Jul 01, 2010 | 1996 Nissan Maxima

1 Answer

Everytime I used my GPS on my 1992 Toyota Previa, the cigarette lighter fuse(15 amp) always got busted or burned. Can I use higher amperage like 20 amp? Thanks


You should not use higher amp, check your charger for he GPS it is probably the problem, charger does not use much power, it is shorting

May 19, 2010 | 1992 Toyota Previa

1 Answer

Why is my charging light coming on at 2000 revs


There seems to be a no charge state in this case. I recommend checking the charging system. use the procedure below to isolate this issue.

Wear protective eye wear and clothing and remove all jewelry when checking your battery and charging system. Jewelry is a good conductor of electricity and is not recommended. Most batteries wear out every 3 to 5 years and need to be replaced. Always replace your battery with an equal replacement battery to assure proper operation. Automotive batteries have a +positive terminal (red), - negative terminal (black). Electricity is stored in the battery and then supplied to the vehicle when the engine is not running. While the engine is running the vehicles alternator charges the battery for future use. (Note: never disconnect the battery while the engine is running. If the battery cable is disconnected from the battery a spark can be generated which can cause the battery to explode or a major electrical malfunction to occur.)

To check a battery surface voltage, remove the positive terminal protective cover. Connect the +positive side meter lead (red) to the positive side battery terminal. Connect the - negative (black) side meter lead to the negative battery terminal. With the vehicle not running and the car sitting over night the battery voltage should be between 12.5 and 12.8 volts.(You will need to use a voltmeter for this testing procedure)

The alternator is rotated by a drive belt driven by the vehicles engine while it is running. Electrical voltage and amperage are generated to recharge the battery and supply voltage to the electrical system of the car. The alternator is held in place with mounting bolts. There is a main electrical wire on the rear of the alternator that supplies voltage to a main voltage junction box. If your alternator is not charging properly, your battery will slowly drain down from operating all the electrical systems in your car and stop the car from running.(most non charge states will be the cause of a loose belt or a low tension rate, due to a mis-adjusted alternator. make sure you have enough tension in the belt for full rotation of the alt pulley)

Next, you will need to check the alternators output with the Amp meter.

Testing the amperage output of the alternator is good for measuring the amount (not the level) of voltage the alternator can produce. This test can be tricky because if the alternator is weak it can still show it as producing amperage. Which is good, but if the voltage is low, it will still allow the battery to go dead. To check the amperage output of an alternator an amp meter is needed. Once the meter is connected start the engine. Next turn on all electrical accessories and raise the engine idle to about 1200 RPM. The alternator should output the max amperage it was designed to produce. Example: a 90 amp alternator should output about 88 amps. Note: An alternator cannot sustain maximum output for long periods of time. If the alternator is forced to operate at maximum output it will overheat and fail. An alternator is designed to operate at max amperage output only for a reasonable amount of time.

((Connect the voltage meter lead the same way you would in a battery static voltage check, Start engine (do not drive) at engine idle the voltage should be between 13.6 to 14.3 volts. If not the alternator may need replacing.)))

Jan 17, 2010 | Renault 181 Cars & Trucks

1 Answer

New battery when i turn on the heat. my battery light came on? why


The alternator should be tested for its operational value in this case. There may be some issues with the charge rate.

Testing the amperage output of the alternator is good for measuring the amount (not the level) of voltage the alternator can produce. This test can be tricky because if the alternator is weak it can still show it as producing amperage. Which is good, but if the voltage is low, it will still allow the battery to go dead. To check the amperage output of an alternator an amp meter is needed. Once the meter is connected start the engine. Next turn on all electrical accessories and raise the engine idle to about 1200 RPM. The alternator should output the max amperage it was designed to produce. Example: a 90 amp alternator should output about 88 amps. Note: An alternator cannot sustain maximum output for long periods of time. If the alternator is forced to operate at maximum output it will overheat and fail. An alternator is designed to operate at max amperage output only for a reasonable amount of time.

((Connect the voltage meter lead the same way you would in a battery static voltage check, Start engine (do not drive) at engine idle the voltage should be between 13.6 to 14.3 volts. If not the alternator may need replacing.)))

Oct 08, 2009 | 1999 Ford Contour

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