Question about 2000 Oldsmobile Alero

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New battery alternater new in march battery light still on

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Start engine ,disconnect neg battery terminal if engine stops renew the alternator ,if it keeps running take the alternator back if its still under warrenty as it will be the warning light control inside the alternator

Posted on Dec 30, 2010

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Posted on Jan 02, 2017

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SOURCE: i installaed new alternater, and battery in 1987

Look at the connecting block and wires.
Not sure about this but it sounds as if a wire is not connected properly. Some have a single wire not with the block. It may even be a separate earth wire

Posted on Mar 20, 2010

Testimonial: "THAT WAS THE PROBLEM. THE WIRE HAD AKNICK IN IT, AND IT WASN`T GETTING A GOOD CONNECTION. THANKS VERY MUCH FOR THE HELP. OJACK."

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I haven't drove my truck for 2 days and this morning I went to start it the battery light was on and on the panel it said check charging system.


It;s either a bad alternater or battery connection. Check battery connection first. If that isn't it go to auto parts store. Most of them will check your battery & alternater for free.If it's the battery, most of the stores will install it for free( I usually give them a 3 or 4 dollar tip, it's worth it). If it's the alternater, buy a new one,usually under $100. Some auto parts stores will lend you the tools to replace it. Normally takes less than 30 minutes to do it.

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Usual culprit is boot (Trunk) light.If not, try disconnecting battery and if a spark jumps as you take the lead off it shows there is a power drain. If no power drain it points to a faulty battery.

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Why is the battery,door and brake warnning lights are on


bad door switch, dose your dome light go out when you close the door? brake light can be a tail light out, put 4way flashers on and see if on doesnt flash. but most common is low brake fluid in the reserve. if its not low a common problem is its sensor an easy fix the replace comes with a new cap just unplug the 2 wires on wireline and plug in the new . battery light comes on if the battery is low or if the alternater is bad . jump the car, once running disconnect the neg. battery terminal if the engine stops the alternater is bad if not get the battery tested

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I have a 1987 260e mercedes benz and i just got a new battery and its dead already


Recharge battery from home, or take battery to supplier to see if it charges, when charged check dash to see if light is on when running, if there is a red light which might be very faint, get diode replaced in alternater, (or checked to see if it is charging) (lot cheaper than buying new alternater). Which most dealers will try and sell you.

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Just cause its a new alternator does mean it should work. I would check the charge when running cause it could just be a bad alternator.

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Battery indicator light came last night. Car died...


you have a faulty alternater there is a speed sensor in the alternator that is linked to the power steering if the alternater isnt charging the steering wont work either replace the alternater and all should be ok

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1 Answer

Replaced battery after car sat for 1 year. battery idiot light comes on when vechle idles falls below 2 rpm


hi, if the battery light is lighting up then this indicates the battery isnt charging properly so what you need to do now is check that the alternater belt is tighten correctly and not slipping check all wires going to the alternater if they are ok then the chance are the alternater needs replacing.

Let me know how you get on or if you need further assistance ok

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BATTERY LIGHT STAYS ON. NEW BATTERY. ALTERNATOR CHARGING OK


Mazda Mpv 2000 I also have the same problem, the alternater is testing good- 14.12Amp, so what is the problem the battery light will not go off.

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