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What is the voltage of an automotive alternator?

Updated: 8/17/2019
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between 13.5 and 14.5 volts with engine running at idle

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Q: What is the voltage of an automotive alternator?
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Where is the voltage regulator on a 1988 Chevy truck?

It's inside the alternator. Almost all automotive alternators have an integrated regulator. i believe it's built into the alternator


What is a 2007 Trailblazer alternator output voltage?

The alternator output voltage in most modern 12 volt automotive systems ranges from 13.5V to 14.5V, with the nominally accepted value being 13.8V. The actual voltage depends on battery charge state and temperature.


Is a diode part of an alternator or the car?

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How much voltage does an alternator put out?

Automotive Alternator Output VoltagesWith a properly operating alternator, AND electrical system, a voltage output range of 13.5 Volts to 16 Volts is considered acceptable.Just the alternator puts out around 120 vac, but most newer alternators include a built in rectifier that limits voltage output to between 13.5 and 15.5 volts DC depending on speed.


Is 15 volts too much from the alternator?

That depends on the application [use] of the alternator. For automotive applications, NO, 15 Volts DC is not too much. Generally, an acceptable voltage output range for automotive applications is 13 Volts minimum to 16 volts maximum.


Where is the voltage regulator located on a 1993 Ford Thunderbird?

Most modern alternators have the voltage regulator inside the alternator housing, so you have to take the vehicle to a automotive electrical shop to have the electrical system tested, unless you want to pull the alternator and take that in.


Why are there 14.5 volt automotive bulbs?

When the alternator on a vehicle is in the charging mode its output is close to 14.5 volts. If a bulb is rated at 12 volts, which is the voltage of a vehicle battery at rest, when the alternator comes on line at a higher voltage the life span of the bulb will be shortened.


Why No voltage going to the alternator?

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Where is the voltage regulator on 1997 Buick Skylark Gran Sport?

The VOLTAGE REGULATOR is built onto your ALTERNATOR. You can usually buy a replacement for it at your local automotive parts dealer, but you can also buy a new, used, or rebuilt alternator. Your V.R. replacement plan is the cheaper though. mdjblue78@yahoo.com


Where is the voltage regulator located on 1995 E350 460 Econoline motor home?

The voltage regulator is built into the back of the alternator. It can be changed if you are able purchase one through a automotive electrical rebuilding shop. Most places just want to sell you a complete alternator. www.autozone.com Click component location.


Why do the voltage battery light keep coming on after a new battery has been installed?

Ah, you have made one of the most common and easiest mistakes to make in automotive maintenance. Because the 'battery voltage' idiot light came on, you assumed that the battery was bad. Did you have an automotive electrical specialist test the electrical system on your car? Did you have the battery tested at a battery shop? Did you know that there are 3 primary parts to an automotive electrical system, and anyone of them can be responsible for the system operating below required voltage levels? Most modern automobiles generate electricity with a device called an alternator, which is driven by a belt from the crankshaft. The alternator generates Direct Current, at voltages up to 20 volts, in some cases. To keep the alternator from frying the battery, a Voltage Regulator is used to control the output of the alternator. This insures that the battery is only charged with a current of 18 volts, or less. Most modern alterators have the voltage regulator inside, but on older cars, the voltage regulator is mounted on the fender or the firewall, somewhere in the engine compartment. So, the alternator generates the electricity used to charge the battery, but the voltage regulator controls the output of the alternator. If the alternator is going bad, it may not be generating enough voltage to charge the battery. The battery is usually a 12 volt battery, and must see more than 12 volts to charge. Or, the alternator output might be reduced to an unusable level by the voltage regulator. Before you replace the entire electrical system, take the car to an automotive electrical specialist for testing. They can determine exactly which component is not working, and repair it. (Note: If the voltage regulator is bad, this DOES NOT mean that the entire alternator must be replaced! In almost all cases, the voltage regulator can be replaced by disassembling the alternator. If the specialist insists that the alternator must be replaced, I would recommend getting a second opinion, even though testing is often not free. Voltage regulators are fairly cheap, and can be replaced by a competent technician without too much difficulty. Alternators are expensive.)


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