Honda Odyssey 2008 Alternator Already Replaced 2x Battery Light on Again

If your Honda Odyssey's bombardment light is on, it ways a few things.  Information technology is trying to warn you that there is an issue with the charging system.  The charging organization itself is relatively unproblematic.  It's near always going to be caused by a bad battery or alternator.

The battery light comes on when it detects that the voltage in the battery is too low.  Most battery lights will come up on when the vehicle starts if the computer has detected that the voltage was as well depression for a quality start.  With an older bombardment, you will often discover this on the commencement truly common cold day of the year.

You lot may have noticed your Odyssey struggling to start, then the battery light stays on after the start.  That would indicate a bad battery, just it's still worth your while to have it tested starting time.

Honda Odyssey Battery Calorie-free Causes

The charging system in vehicles hasn't changed that much in the last l years.  The engine turns the alternator, which charges the bombardment.  At that place isn't a lot to it, which makes diagnosing information technology relatively simple.

ane. Bombardment

The bombardment is primarily in that location to start your Odyssey.  It can run off the alternator just fine in one case it'south started.  This is an important thing to know.  A bad battery unremarkably makes itself known when you are trying to showtime the vehicle.

ii. Alternator

A typical alternator

A bad alternator volition ordinarily make itself known when the engine is already running.  If you lot see your Odyssey'southward battery light turns on while the engine is already running, that is a stiff indication that the alternator is no longer providing enough wattage to power the diverse electrical systems and charge the battery at the same time.  A new alternator will rectify the problem.

See Also:  Honda Odyssey Bad Alternator Diagnosis

3. Alternator Belt

Nearly all modern vehicles use a serpentine belt to plough the alternator.  The serpentine chugalug turns more than than ane engine accessory (A/C compressor, power steering, etc).  If the serpentine belt goes bad, it will no longer be able to turn your Odyssey's alternator plenty for information technology to go an adequate accuse.

4. Battery Mail 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 really corroded, it won't be able to do its job of sending the voltage to and from the bombardment efficiently, and your Odyssey'south bombardment calorie-free volition turn on.

It only takes a 2d to check it out.  A battery mail cleaner or wire brush can make clean it up in no time.  Just exist careful not to get whatever of the corrosion in your eye.

Battery Light Diagnosis:  Honda Odyssey

Yous tin can diagnose whether your Odyssey'due south alternator is bad pretty quick at home.  If you have a voltage meter, that's a fantastic place to start.

Voltage Test

The first thing that yous'll want to practise is go a practiced multimeter.  With a multimeter you lot do a quick test to encounter if your Odyssey's alternator is working or not.

The post-obit was taken from bad alternator diagnosis page on this site:

1. Set the multimeter to read voltage. Specifically, y'all'll need to set information technology to 20V DC.
2. With your Odyssey turned off, you'll connect the negative side of the meter to the negative battery post or wire.  Touch the positive side of the voltmeter to the positive battery wire.  With the engine off, you should go a reading somewhere between 12.0 volts and 12.half dozen volts.
3. Now that you have a baseline, it's time to plough the engine on.  Leave the air conditioner off, likewise as the headlights and whatever other accessories.
4. Later on firing the engine upwards, you should get over 14.2 volts.  If you got 14.2 or more than volts, the alternator is charging fine.  If it's withal showing in the 12'southward, information technology's time to replace the alternator.  If information technology'south producing a voltage level in the 13'due south, get ahead and accept information technology into a parts shop and accept it tested.  Information technology'due south probably bad.
5. At present, assuming that the alternator was producing over 14 volts, go ahead and turn on the headlights, air conditioner, radio, and whatsoever other accompaniment you can think of, and run the same examination all over again.  If the voltage dropped back into the 12'southward, information technology's a very strong indication that your Odyssey's alternator is bad.  Information technology's still worth having it tested, but be prepared to supersede it.

Battery Test

If the alternator seemed to be charging the battery fine, and then it is time to move on to the battery itself.  We recommend taking it to the local parts store.  Almost all of them volition exam it for gratuitous.  If it's bad, they'll even install the new 1.

Decision:  Honda Odyssey Bombardment Light

Your Odyssey will operate for a short period of fourth dimension off of the battery alone.  Simply, if the alternator has gone bad, it will eventually leave y'all stranded.  If your battery calorie-free comes on when you lot are on the road, become somewhere to have it tested as before long equally you can.  If yous feel there is anything you tin add, please leave a comment below.  Skilful luck!

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

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