Question about 1992 Chevrolet Astro Extended

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When my van is off, something is draining the battery. I have had both the battery and alternator checked both are putting out 12volts. What else could I check for?

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Please see my tip at http://www.fixya.com/cars/r5925550-dead_battery_troubleshooting . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Posted on Nov 07, 2010

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Avoid a dead battery


If your battery is discharging while the van is parked up, there's 3 general causes:
  • The battery itself is failing and cannot hold a charge. replacement is the only option.
  • There is a fault within the alternator - either the alternator is not charging or it is allowing the battery to drain because the diodes (the rectifier in the alternator) have failed.
  • There's a parasitic drain of power somewhere. Something is remaining 'live' when the van is parked up - and draining the battery.
Many places will do a free battery check.

Apr 21, 2016 | 1998 Chevrolet Astro Van

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2002 astro van , just shut down, lost all power, including breaks and power steering, what can cause this to happen? Battery drained


if the batter has been drained during operation, it points to a serious alternator /regulator failure
The vehicle uses most of the alternator out put during normal operations and a percentage is left over to charge the battery
Check for voltage out put from the alternator and ensure that it is dc volts as ac volts indicate a rectifier failure and will not charge a battery
check for drive belt tension and condition as a bad belt will not drive an alternator at full capacity
I suggest that you have the alternator and regulator bench tested by an accredited auto electrician and have the battery load tested as well to check for broken cell bridges

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Battery light on.new battery put in.light still on


the battery light indicates an "battery charging problem" something is with the alternator it could be the alternator belt or the alternator itself
good luck

Jul 19, 2010 | 2003 Ford Windstar

2 Answers

Alternator? Van has been draining batteries and now wont start


Jump start your van, with a volt meter check voltage at battery with engine running and jumper cable disconnected, you will be checking alternator out put voltage there, should have a reading of not less then 13.5 volt's, if less replace alternator, alternator is not hard to replace. two or three bolts is all that holds it in place, don't forget to disconnect battery before removing alternator.

Jun 09, 2010 | 1999 Plymouth Voyager

1 Answer

2001 ford windstar battery being drained and i dont know why


I had this problem. i thought it was a parasitic drain but...
check your charging system. with the van running, check the voltage output accross the battery terminals. if its less than 14.1 check the inline fuse for the alternator (close to the alternator) if ok, replace the voltage regulator inside the alternator.

if the charging system is putting out 14+ volts then you need to start pulling fuses while van is off while monitoring the current draw between the positive battery post and the positive terminal clamp watching for a current drop. keep in mind the windstar will drain alot of current while off for the first 2 mins er so, then it will drop again in about 15 mins... time delay shutdown on several systems :)

May 01, 2010 | 2001 Ford Windstar

2 Answers

I have a brand new battery in the vehicle and it went dead in less than 2 weeks. Would the computer located in the fender well have anything to do with the battery being dead? I have had the alternator...


You need to check for something that is a constant drain on the battery.
Is the underhood light staying on?
Are the interior lights left on?
Is the glove box light staying on?
Has anything been added to the van recently like an alarm, radio, amplifier, etc?
Do you leave your GPS unit plugged in or cell phone charger plugged in?
I would start my search (since you have already had the alt output checked) looking for something that is draining the battery slowly.

Feb 23, 2010 | 1998 Chrysler Town & Country

1 Answer

Battery goes dead while driving ck out put on alt ok at the time replaced computer same thing also it may start working ck all elect connection 2000 4x4 jeep cherokee


Hello. If your battery is not charging while driving, often it is due to low or bad voltage from your voltage regulator, which is also in the Alternator usually on these vehicles. Your engine has been running off the battery only and draining it, not using the alternator's power. Here are some things to look for and a question for clarification:

If you actually replaced the alternator already your regulator should be good. But to clarify your problem report, did you replace the alternator or only check it? It may take several checks while truck is running to catch the problem. If you have not done so already you will need to verify that voltage (13.9 volts or more) is actually reaching right to your battery. 12Volts will not be enough, that means something is wrong and is just battery volts. Please do this test while your Jeep is running, with lights on. DC volts across the battery need to be about 14 Volts while all is on. If you don't get that either the Alternator/VR is bad OR bad connection to it.

Oct 30, 2009 | 2000 Jeep Grand Cherokee

1 Answer

84 CK TRK, 2500, 5.7L 55,000 miles have replaced alternator twice - battery still reads 12 volts. Trickle charge on battery OK and engine starts up OK - terminal 1 on alternator wire (brown) reads 2.4volts...


On some of the older style GM's you can take that brown wire and cut it and take the end leading from the alternator and hook it directly to the hot terminal on the alternator and just leave it hooked up and it will work. But I have ran into the occasional problem where leaving it hooked up will drain the battery when the vehicle isn't running. Hope this helps..

Oct 24, 2009 | Chevrolet Silverado 2500 Cars & Trucks

1 Answer

Vivaro with no ignition lights battery reads 12 v all engine fuse


Did AAA jump your battery? if not hook a comercial battery charger up to; or, remove recharge; your battery: this should release the locks then: you have either short draining your battery or, a bad alternator or, battery

Mar 09, 2009 | 2002 Volkswagen Eurovan

1 Answer

Something is draining the battery; alternator checks ok; new batt


if you can get the car started while it is running take the positive side of the battery cable off if it dies then it is the alternator if it does not die check the drive belt to see if it is loose or slipping

Jan 08, 2009 | 2002 Dodge Grand Caravan

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