Question about 1989 Chevrolet C1500

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Alternator and battery good but will not recharge battery

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Make sure you have a good ground,

Posted on Apr 10, 2011

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1 Answer

Battery no charging


make sure you have a good battery. Alternator will not charge a bad battery, new or not. Also, charge the battery up with a charger before driving, all the alternator is to do is keep it charged, not recharge.

Feb 17, 2015 | 2004 Chevrolet TrailBlazer

1 Answer

If i take the positive cable off the battery will it die?


No. Not right away.

Over-simplified, the (+) post of the battery is connected to the starter via the starter solenoid, ignition system, the alternator and the the fuse box. The battery's main purpose is to (1) provide a large amount of current for a short time (2) provide power any time the alternator isn't turning.

If you start the engine, and then remove the (+) cable from the battery (and insulate it from touching anything metal on the car) the engine will continue to run - but the battery will not recharge. The alternator would normally provide power to meet the electrical requirements of the car, ignition and slowly recharge the battery. If the battery is diconnected - it cannot recharge, After repeated starts without recharging the battery (either via traditional battery charger or connection to the car's alternator), it will no longer have sufficient charge to crank the engine over.

There are other benfits to leaving the battery connected - it acts as a large power conditioner or filter. It minimizes buzz, hiss, clicks from speakers and improves power quality to the rest of the electrical system by preventing voltages from dropping too low under intemittant heavy electrical loads while driving. If the cable is removed and it should touch the grounded metal of the vehicle, the engine would stop and it is very likely that the voltage regulator has been damaged beyond repair and require replacement. This part is often located inside the alternator and can be an expensive fix.

I hope this answers your question & good luck!

Feb 05, 2013 | 2004 Dodge Ram 1500

1 Answer

The battery is good the alternator is good,but it is not getting enough volts to recharge the battery.


if the battery has a dead cell or two it will not charge all the way,,if the alternator is not putting out 13 to 14 volts its not charging at full..

Apr 03, 2011 | 1998 Chrysler Town & Country

3 Answers

Battery light went on and the vehicle died under way 20 minutes later.


If the Power steering and everything else seems to work the problem should be in the Alternator or Battery. Check your Battery cables for loose or dirty connections.

If you find the Battery cables were the problem, you need to recharge the Battery. A jumpstart may get you going, but the Alternator is meant to keep up with the current electrical demands and it will take a long time to fully recharge the Battery.

Autozone and Oreillys can check the Alternator and Battery if they are carried in, or on the car. Since the Expedition is dead, you can take in the Battery for a recharge and testing. This will keep you from needless work removing the Alternator if only the Battery was bad. If the Battery tests good after the recharge, then your only remaining option is to remove the Alternator for testing. Should both the Battery and the Alternator test out good, you have a major electrical malfunction. You will need an electrical shop.

Jun 03, 2010 | 2001 Ford Expedition

1 Answer

Battery draining when off. We have recharged battery 3 times. Have tested the battery it is good. After the recharge it is dead.


It is quite likely to be a faulty diode within your alternator. This can easily be checked by disconnecting your alternator, then leaving the car stood overnight with a freshley charged battery.
If the battery holds its charge, replace the alternator.

Mar 13, 2010 | 1990 Ford Taurus

3 Answers

My car always can't start


it is probably just an old battery problem,if there was a problem with the alternator it would have showed up while you were driving it saying not charging,

Dec 26, 2009 | 1995 Volvo 850

1 Answer

Car won't start. Replaced battery. worked 3 days. They said it was the alternator. REplaced with new. worked another 4 days. had it check with advance auto said battery good, starter cranking normal....


if there is no charging then its back to the alternator or the way its hooked up? did you recharge your flat battery with a mains charger after it went flat the first time? as no alternator will charge a battery from flat to fully charged,,,,even if you drove around the world none stop! the new alternator may have given up working becouse you overloaded the voltage regulator trying to recharge a flat battery witch would mean it was very week to start with?

Nov 15, 2009 | Pontiac GTO Cars & Trucks

4 Answers

Hi ,we recharged the battery in our magna and idled for about 5 minutes..when we went to drive it kept stopping every time the revs went down ...any ideas thanks larlee australia


Make sure wire conections to alternator are clean and secure. If it's still not charging properly at idle then alternator might need repair. Also make sure engine oil level is okay.

Aug 16, 2009 | Mitsubishi Passenger Cars & Trucks

1 Answer

Seems to be electrical problem


What initiated the need for jump starting? Is the alternator charging? Has the battery been checked?

To check the alternator, once the engine has been jumped and is running, remove one of the battery post connections. If the engine dies, the alternator is not charging the battery, and the symptoms you describe are the on-board computer going through low voltage spasms until sufficient electrical power to operate the engine / tranny is drained and the car dies.

If the car continues to run with no battery attached, the alternator is charging - - - and I would recommend removing the battery and having it checked and (if good) recharged to full capacity. I would also recommend having it charged even if the alternator is the problem just to delay the onset of the low voltage problems. The car should operate normally for a few miles before the battery drains too low after a full recharge, enabling you to get it to a shop for alternator service / replacement.

If you attempt replacing the alternator yourself, make sure the battery is disconnected prior to starting the job. Saves blowing up good stuff by accidental short.

Hope this helps and good luck!

-WB.

Jun 12, 2008 | 2002 Mazda Tribute

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