Question about 2006 Toyota RAV4

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Battery light test battery and alternator. replaced battery. light still on. what could be wrong

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Alternator is not charging

Posted on Jul 26, 2013

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The warning light should be on when the alternator is not charging the battery. Are you saying you had the charging system checked on the truck and all is well ?

Posted on Jul 26, 2013

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1 Answer

My alternator light is working and the alternator is good but the battery is still being drained. Battery is good also. What is wrong?


place a test light between the neg battery cable and the battery see how bright the light is remove fuses til the light dims that is the circuit draining the battery glove box lights and alternator diodes so you may need to unplug the alternator it could charge and still draw down the battery when not running

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Battery light goes on and off


Your running the alternator on borrowed time as its a matter of time before the battery dies and needs replacement along with the old alternator. The light is indicating something wrong with the electrical system. A simple test at your favorite auto store capable of checking the battery/alternator system will reveal what's wrong or you can perform some simple measurements of battery voltage to determine the issues - the alternator is due for replacement and possibly the battery if it was allowed to operate with the battery light going on and off for a long time otherwise the alternator is on its last legs unless you can find loose connections on the alternator.

Usually alternators wear out; the brushes wear down after so many thousands of miles where they begin to lose physical contact and intermittently turn on the low voltage indicator warning you of electrical power problems. Measuring at the battery terminals should show battery voltage around 12.5v+, engine idling 13.5v+, above idling 14.3v+. If the last two voltages don't vary above battery voltage then the alternator is faulty. Remove it for testing before replacement. With so many miles on it, its due for replacement.

Oct 16, 2011 | BMW 325 Cars & Trucks

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What could be wrong if the battery light came on and not long after we lost power? when we got a jump start two times it would not hold the charge long enough to even move it?


It sounds like you have a bad alternator. Be sure to check to make sure your battery connections are tight and clean. If it is your alternator you will need to charge your battery before you run your car after replacing your alternator. You may also have a bad battery but generally if you jump a bad battery your car will stay running as the alternator will keep it running but if you ran your battery dead a simple jump start will not keep the car running if your alternator is bad. Most part stores can test your alternator and battery. Your battery will need to be charged before it can be tested. They do not need to be in the car to test them.

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its the warning control light in the altenator.you will need to change the regulator in the altenator or replace altenator .best advice ??ignore it

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I have a 2001 PT Cruiser. The battery light came


Is it a remanufactured alternator. It sounds like you either got a faulty alternator or a wire is hooked up incorectly to it. I would test the voltage on the new one to make sure it wasnt a lemon If you are sure the wires are hooked up correctly.

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Charging Light On After Replacing Alternator/Battery1999Windstar


Hi, I can't tell you exactly what is wrong because there is too much involved at this point, what with 2 shops working with it, but I can give you some advise on what else to check. On the alternators and the wiring that supports them a small volt charge is taken off one of the slip rings, where the brushes ride, for the purpose of turning out the light. As I remember, this is a yellow wire that runs back to the dash.

To the alternator, it would be one of the wires that plug into the side of the alternator case.
jetski

Nov 20, 2008 | 1999 Ford Windstar

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