what electrical parts can cause battery light to come on 2002 honda crv

If your Honda CR-V'southward battery light is on, it means a few things.  Information technology is trying to warn you lot that there is an effect with the charging system.  The charging organization itself is relatively simple.  It's almost e'er going to be caused by a bad bombardment or alternator.

The bombardment calorie-free comes on when it detects that the voltage in the battery is as well low.  Most battery lights volition come up on when the vehicle starts if the calculator has detected that the voltage was also low for a quality start.  With an older battery, you volition ofttimes notice this on the kickoff truly cold day of the year.

You may take noticed your CR-Five struggling to start, then the battery light stays on after the get-go.  That would indicate a bad battery, merely information technology'southward still worth your while to have it tested first.

Honda CR-5 Bombardment Light Causes

The charging system in vehicles hasn't changed that much in the terminal 50 years.  The engine turns the alternator, which charges the battery.  In that location isn't a lot to it, which makes diagnosing it relatively simple.

1. Battery

The bombardment is primarily at that place to start your CR-V.  It can run off the alternator just fine once it's started.  This is an important thing to know.  A bad battery ordinarily makes itself known when you are trying to offset the vehicle.

2. Alternator

A typical alternator

A bad alternator will normally make itself known when the engine is already running.  If yous run into your CR-V'south battery light turns on while the engine is already running, that is a strong indication that the alternator is no longer providing enough wattage to power the various electrical systems and accuse the battery at the same time.  A new alternator will rectify the problem.

See As well:  Honda CR-V Bad Alternator Diagnosis

3. Alternator Belt

Nearly all mod vehicles apply a serpentine belt to turn the alternator.  The serpentine chugalug turns more than 1 engine accessory (A/C compressor, power steering, etc).  If the serpentine belt goes bad, it volition no longer be able to plow your CR-Five's alternator enough for it to become an adequate charge.

iv. Battery Post Corrosion

The voltage from the alternator is sent to the battery through a wire that connects to the battery post.  If the battery post is actually corroded, it won't be able to do its chore of sending the voltage to and from the battery efficiently, and your CR-5'due south battery lite will turn on.

It just takes a second to check it out.  A bombardment mail service cleaner or wire castor tin can make clean it up in no time.  But be careful not to get any of the corrosion in your eye.

Battery Light Diagnosis:  Honda CR-V

You tin can diagnose whether your CR-V's alternator is bad pretty quick at dwelling.  If you take a voltage meter, that'due south a fantastic place to start.

Voltage Examination

The first thing that you lot'll desire to do is get a good multimeter.  With a multimeter yous do a quick test to run into if your CR-Five's alternator is working or not.

The following was taken from bad alternator diagnosis page on this site:

1. Gear up the multimeter to read voltage. Specifically, y'all'll need to set it to 20V DC.
2. With your CR-5 turned off, you'll connect the negative side of the meter to the negative bombardment mail or wire.  Touch the positive side of the voltmeter to the positive battery wire.  With the engine off, yous should get a reading somewhere between 12.0 volts and 12.6 volts.
3. Now that you have a baseline, it'due south time to turn the engine on.  Exit the air conditioner off, too as the headlights and any other accessories.
4. After firing the engine upwardly, you should get over 14.two volts.  If you lot got 14.2 or more than volts, the alternator is charging fine.  If information technology'southward still showing in the 12'southward, it's time to supervene upon the alternator.  If it'due south producing a voltage level in the thirteen's, go ahead and have information technology into a parts store and have it tested.  Information technology's probably bad.
5. Now, assuming that the alternator was producing over fourteen volts, go ahead and turn on the headlights, air conditioner, radio, and whatsoever other accessory you can think of, and run the same test all over over again.  If the voltage dropped dorsum into the 12'south, it's a very strong indication that your CR-V'southward alternator is bad.  Information technology's still worth having information technology tested, but be prepared to replace it.

Battery Examination

If the alternator seemed to be charging the battery fine, then information technology is time to move on to the battery itself.  We recommend taking information technology to the local parts store.  Virtually all of them will examination information technology for free.  If information technology's bad, they'll even install the new one.

Conclusion:  Honda CR-V Battery Light

Your CR-V will operate for a short menstruation of time off of the battery alone.  But, if the alternator has gone bad, it will somewhen leave you stranded.  If your bombardment calorie-free comes on when you are on the road, get somewhere to have it tested as presently as yous can.  If you feel at that place is anything you can add, delight leave a comment beneath.  Skilful luck!

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Source: https://www.700r4transmissionhq.com/honda-cr-v-battery-light/

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