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Alternators

An alternator is an old term for electric generator that converts mechanical energy to electrical energy producing alternating current. Alternators are mainly used for recharging batteries and to power electrical loads of vehicles.

4,629 Questions

What do you need to test your car's alternator?

You can test it with a simple digital DC voltmeter. Set the voltage of the meter to the 20 Volt DC scale. Start the engine and let it idle. You should read 13.5 to 15.5 Volts at the battery posts. Any less than 13 or more than 16 volts and the alternator is suspect. Best to drive it to your local auto parts store where they will inspect the charging system for free.

How much time does it take a car alternator to charge a battery?

It varies depending on how much other electronics you are using on the vehicle at the time. Could take hours. I do not recommend you charge any dead battery with the alternator if you can avoid it. it puts too much of a strain on the alternator and may damage it. Charge a dead battery with a battery charger.

How do you replace an alternator on a 1991 buick regal?

Disconnect the 1991 Regal battery. Remove the alternator belt and wiring. Unbolt the alternator and install the new one. Reconnect the wires, install the belt, then reconnect the battery.

How do you replace a 1998 Pontiac TransSport alternator?

You don't have to remove the motor mounts,clock the engine,Remove the subframe or all that other garbage....Just remove the washer tank, wiper linkage,battery, & unbolt the alternator. It will just maneuver right out where the tank used to be.

Why does your 2002 ford focus alternator keep dying?

theres someting wrong on them i got two and i replace it on mine 2 times and 3times on my wifes car 02 zts both

Why is your Battery not charging after replacing alternator on 95 ford probe?

Chances are you drained your battery when your alternator failed to maintain your cars regular running functions. You should take the battery to your local auto parts store, they should be able to test it for free.

How many watts can the stock alternator handle on a Ford Focus?


it is not watts, but amps. If you are just adding a stero you should be fine. But, if you are adding several amps and equipment, check into a higer amp alternator (good luck on a Focus) and dual batteries with an isolator. If you run dual batteries without the isolator it will not work as well.

Why does your alternator and speed sensor fuse keeps blowing on a Honda Civic LX?

you probably have a short in the fuse box, check the fuses and check it again, if it's not that check the wiring from the sensor and the alternator. any of them may need replacing.
You have a short circuit under the intake manifold where the wire harness crosses over the intake support bracket. Raise the car, go under and look up on the back side of the motor - look up under the intake manifold. There is a steel support bracket and a large wire harness just above it. the wires have rubbed on the bracket and worn through their insulation. Lift the wires back and tape everything up. It isn't even expensive to fix!!!

What type of alternator is on a 1998 Chevy venture 105 or 140 and how to tell?

On another type of vehicle that I had, I removed the alternator and found a data plate which had the rating on it. You can never go wrong by putting a heavier duty one (140)then what is installed as it allows for more accessories to be run. Your call. Hope this is off some assistance to you.

How do you replace alternator on 1994 Ford F-150?

take the belt off remember how its routed, locate alternator, locate bolt on top its a 9/16, then locate the other bolt at the exact opposite end its a 9/16 also pull the plugs when you put it in make sure battery is FULLY CHARGED

Why does the battery light come on the battery and alternator have been checked and are good It's a 2000 dodge intrepid?

The battery light comes on when the alternator is either over or under charging. If the alternator tested good you have a wiring or computer problem. The engine computer is the voltage regulator.

Where is the location of the alternator in a 1998 ford escort engine?

The alternator is on the top left corner of the engine as you are looking at it from the front.

How do you remove an alternator off an Isuzu trooper?

Should only be 2 bolts-1 at 6 & 1 at 12 o' clock. Remove those & wires from back (disconnect batt first) & just R&R. Belt has to come off first. Alt will swing sideways once you loosen top bolt or if serpentine, just pry on idler to get slack with pry bar. If serpentine, make sure you have routing diagram (or note) before removal.

How do you check if my alternator is bad or my batter is bad in my car?

If the car won't start, jump it off. While it is running, remove the positive cable from the battery. If the car dies, then your alternator is bad. If it keeps running then you may have a bad battery.

How do know when alternator is bad?

If your talking about cars...

If you smell a burning smell, or your red battery light comes on then i would get your alternator checked out!

How do you change alternator on Buick regal?

Disconnect the battery, then remove the alternator belt on the Regal. Unhook the alternator wiring and bolts, then remove it. Installation of the new unit is reverse of the procedures.

How much does it cost to replace an alternator on an Infiniti I30?

mine cost me $800 today!!! I'm so sad and broke i want to die mine cost me $800 today!!! I'm so sad and broke i want to die

What does a dodge voltage regulator do?

It controlls the output voltage of the alternator.

What are the difference between dynamo and motor?

A dynamo takes in motion and outputs electricity and a motor takes in electricity and outputs motion. A dynamo converts mechanical energy to electric energy while a motor converts electrical energy to mechanical energy.

What are the signs of a bad car battery?

if the car starts harder the first time of the day, than the rest this is an indication. If you leave your lights on for a short period of time, then you don't have the power to start, it is an indication of a weak battery. If your car will start better after you have driven for an extended period of time, and restart it right away, but it doesn't start as well when it sits for an hour or two. If your car starts worse when it is warm or hot, this is usually an indication of a bad or worn starter. if you notice a decrease in power, you should clean your battery cables, and check the water level in your battery. Many batteries are sealed, but if yours has raised caps, use a screwdriver to pry the caps off. The water level should be about an eighth of an inch above the top of the lead plates. if one or two of the cells have a significantly lower water level, they are probably bad cells. Use distilled water to raise the water level to desired mark. Do not overfill, it will just get pushed out. Many shops will do a free hydrometer and load test on a battery, as well as check the status of your alternator. Remember it is always cheaper to replace a bad battery than to wait, and have to replace the alternator too--bad batteries are the largest cause for premature alternator failure.