Question about 1997 Lexus LS 400

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Complete power failure

My car died in traffic. I had a new battery and alternator replaced 8 weeks ago for the same problem,could it have been another problem that did not get fixed?

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If your car doesnt even turn over when you try to start it then I would check connections to the starter and alternator, and grounds for corrosion and disconnects.

Posted on May 25, 2009

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I have 91 Previa and about a week ago I was at a stoplight and the battery light flickered on and then my van lost power and died. I bought a new battery and all seemed well until 2 days later when


Hi

Yes it sounds like the alternator voltage regulator is wearing down and needs to be changed or replaced.

If you can get your hands on a 12 volt multimeter, turn the setting to 20 dc and place the negative wire on the negative battery post and the positive wire on the positive battery post.


The battery with motor off should be 12.6 volts and higher, start the the car the read out should be 14.,2 or higher.


You can turn the lights and heater on to see if the alternator can cope with the load.


if read out is less then you need to change or replace it.

Cheers

Nov 21, 2012 | Cars & Trucks

1 Answer

My battery keeps dieing while running. just changed the alternater three weeks ago.


Hi.

Make sure that you also replaced the battery. Battery elements may be shorted inside. That will result in battery draining even if the alternator is working.

If you have already replaced the battery check power across battery terminals with engine on and revving above idle.You should read voltage in a range of 13.5/14.4 volts when engine is revving at about 2K rpm.

If the voltage is still wrong after replacing alternator and battery check the voltage regulator connected to the alternator. Here the part.

If battery, alternator and power regulator are OK, test wiring to find out if there is a short to ground that is draining the battery while you drive. This fault is quite unusual with your symptoms. Check battery, alternator and voltage regulator first.

Regards.

Ginko

Dec 15, 2011 | 1991 Pontiac Sunbird

1 Answer

2008 v8 2wd 2d 24,000m volts go a bit high, then a bit low, then engine will die, in stop n go traffic. in the shop 3 times now. everything is checking out fine. last time 1wk ago replaced battery...


This sounds like a bad alternator, its sounds like it sometimes charges and somtimes not, check the wiring to alternator and if all is good then repolace the alternator.this should be under warranty. i would ask them to just replace the alt. hope this helps.

Oct 27, 2010 | 2008 GMC Sierra 1500 2WD

1 Answer

Replaced the battery one week ago, car won't start


Might be strange but it sounds like the alternator might have died.

Jun 28, 2010 | 1992 Mitsubishi Eclipse

1 Answer

My 1994 chevorlet lumina apv-3.1 motor: when you


when you say car lost power bought a new battery.sound like alternator not charging battery.with car running your voltage at battery should be 13.5 volts or 14.5 volts it not alternators need replacing.have garage replace alternator if faulty because 1993 to 1994 cars if you disconnect battery car would lose memory causing car not to idle.the car will stall out at a stop light or stop sign whole lot.it would relearn itself but the stalling out dangerous around a lot of traffic.

Nov 26, 2009 | 1994 Chevrolet Lumina APV

2 Answers

Battery light comes on, replaced battery 1 week ago because of supposed dead cell(had replaced it a year ago as well) had them test alternator at the time said it was holding charge last night van died no...


THE BATTERY LIGHT COMES ON TO ALERT YOU TO THE FACT THAT THE BATTERY IS NOT BEING CHARGED BY THE ALTERNATOR, IT DOESN'T MEAN THE BATTERY HAS A PROBLEM, HAVE THE ALTERNATOR TESTED FOR PROPER OPERATION.

Nov 06, 2009 | 1998 Dodge Grand Caravan

3 Answers

2003 BMW 325xi won't start, dashboard and radio go on.


My 2003 325xi died on the highway a few weeks ago, and I thought it was the battery. It turned out to be the alternator, which was an expensive problem to repair. If your battery is new, it could be the alternator, or a problem with the electrical system. I find the BMWs to be too complicated electrically, which often leads to problems! I'd check your alternator...

Aug 08, 2009 | 2003 BMW 325

1 Answer

Car won't start even after new battery purchase


Alternator problem, the alternator charges the battery when car is running, so it has probably died now. Was working at reduced capacity for a while, which is why you were only getting a partial charge for some time. Now you have an open circuit completely as alternator has failed completely, time for a visit to an auto electrician. PS replacing acid in battery with distilled water is not a good idea. It probably was time for a new battery anyway.

Mar 19, 2009 | 2003 Toyota Camry Solara

1 Answer

Alternator on 1997 ford ranger


Yes this sounds like the problem may be the alternator has low output voltage.

Sep 22, 2008 | 1997 Ford Ranger SuperCab

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