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How long does it take to deep charge a 12 volt auto battery?

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SOURCE: 2002 monte carlo will not charge has a new battery

When the engine is running fast idle, the battery voltage should read 13.5 to 14.5 volts if the alternator is delivering charge to the battery. If the old alternator had a shorted diode, the very high current from the battery back through that diode will burn out what is known as a fuse link which is located within the wiring harness and it will effectively disconnect the alternator output from the battery. The battery end is connected at the starter terminal where the positive battery cable also connects.

Posted on Aug 18, 2009

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SOURCE: 84 CK TRK, 2500, 5.7L 55,000 miles have replaced

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..

Posted on Oct 25, 2009

Testimonial: "I fixed the problem - the terminal at the brown wire was corroded - after cleaning and recrimping - everything works - thanks for the heads up"

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Battery on my 2010 sonata reads 12v. but car will not start

First put a full charge in the battery...It takes about 13.5 volts to properly start you car due to starter load..Your 12 volt battery will show 12 volt no matter the state of must have it load tested...meaning how many volts the battery is putting out under load " starter engaged " a weak cell will cause failure of this test.. any of tne auto parts stores will test it for you...good luck

Mar 02, 2015 | 2010 Hyundai Sonata

1 Answer

My 2003 Bravada has "battery not charging" light, but car starts fine. Auto Zone tested battery...Fine. Said it was alternator, but how do i know?

Suing a volt meter check to see what the charging voltage is at the battery with the engine running. If you see more than 14 volts than the alternator is working. If you see less than 13 and most likely you will see 12, the alternator is not working. Next shut off the engine and make sure there is 12 volts on the large cable/terminal on the back of the alternator. If there is replace the alternator.

Sep 01, 2014 | 2003 Oldsmobile Bravada

2 Answers

My 2003 Ford Expedition's battery dies unexpectedly after it charges.

make sure all grounds are good and follow all the main power wires,it sounds like a short or a accessory being left on ,at least swap it with another battery and see if it does it to the new one\

Mar 01, 2014 | 2003 Ford Expedition

1 Answer

Need owners manual for Century model 87151 auto battery charger

For car, do not set to DEEP charge.

Just set the switch to 12v or 6v to charge your car.
If your car has 12 volt battery, then set it to 12v.
Clip RED Cable to Positive on battery.
Clip BLACK Cable to car's GROUND of the car.
Plug in the cord to AC Outlet.

Mar 14, 2013 | Cars & Trucks

1 Answer

2001 ford explorer sport wont charge

I'm not sure if you have all of the info you need to go forward with this.
The battery may be rated for 800 amps but could have less than 12 volts if the alternator is not charging it.
It could have a dead cell which would keep it from holding a charge.
You would need to check the charge of the battery with a volt meter, then see if the alternator is charging at 14 volts when the engine is running. The battery should be at least 12 volts with the engine off.
The problem could be in the wiring from the key switch or dash gauges back to the alternator.

Jan 26, 2013 | 2001 Ford Explorer Sport

1 Answer

My battery light flashes and then my tc light is on with what looks like a wrench beside it pontiac montana

Sounds like a bad alternator. GM vehicles are notorious for failing starters, alternators and fuel pumps. If your battery light is flashing, your alternator is not putting out enough keep the battery charges and keep all of those electronics running. take a volt meter. You should get anywhere from 13.8 to 14.8 volts with your engine running and about 12 volts with everything off. Take the vehicle to your local auto parts store for a free charging system test. Advance auto parts can load test the battery and charging system.

Jul 17, 2011 | 2003 Pontiac Montana

1 Answer

I have a2001 Saturn SL and the battery light came on,Ireplaced the battery and had the Alternater checked but the battery light stays on. Advance Auto Parts said the alternater is not chargeing

Battery light usually means the alternator is not charging, get yourself a multimeter, select Volts, put red probe on positive and black probe on negative while the car is running, it should read above 13 Volts, not higher than high 14s, if it reads 12 volts or lower while engine is running than your charging system, alternator mainly, needs attention, any decent mechanic can check this in 2 minutes.

Jun 16, 2011 | Saturn LS Cars & Trucks

3 Answers

Replaced battery. still would not start. Cleaned treminal of all corrision. cranked fine. however 1 day later would not start. jump started . drove a couple of miles but when I turned on lights, engine...

Sounds like a bad alternator. Drained your battery and when you turned on the lights it took all the power left in your battery. When you drain a battery down that far, they are real hard to jump, and coupled with the alternator, the car is not producing enough current to start and stay running.

I would take the alternator off and take it to oyur local auto parts store to be tested. If bad, replace it and charge the battery fully before starting. Then check voltage at battery with motor running. Should be 13.2 -14 Volts DC. If not, you may have a bad battery cable or blown fusible link. (especially that if the alternator tests good).....Mike

Jun 15, 2011 | 1996 Ford Explorer

2 Answers

Battery light is on and it says it the alternator or the battery just needs to be charged

Its the same system to the light. You could take the car to Sears or an other large auto parts store and ask them to check the chargeing system.They check it for free. Or if you have a volt meter, with the engine running check the volts at the battery. It should be from 12-14 volts. As long as it says 12.5 volts up to 14 volts then your alternator is chargeing and could be you battery is bad.

Nov 03, 2009 | 1983 Oldsmobile Ninety Eight

2 Answers

When i try to start my truck after 2 times the battary will be drained what should i do

A battery in good condition with proper charge will last more than two failed attempts at starting, your battery sounds to be defective or at least in need of a deep charge befroe continuing, if the battery is more than 3 or 4 years old , it's probably time to replace it... try a new battery if your current battery fails a amperage draw test, take to a discount auto parts store for a free battey analysis...please rate my help. thanks...

Aug 08, 2009 | 1981 Ford F 100

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