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Battery is not charging warning - 2008 Saab 9-3

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This is usually caused by a bad connection on the battery post. Clean the posts and cable connectors and see if the light goes out. If it doesn't then try starting the car and then disconnect the positive cable from the battery with the motor still running. If the engine dies, replace or rebuild your alternator.

Posted on Feb 17, 2012

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What is causing the battery to drain?


Running the car will drain the battery it if it's not charging ! An if your charging light is on it isn't charging ! Did you check power an grounds on the alternator ? There is a single heavier wire on the back of the alternator, this should have battery voltage ! You may want to take this to a ASE certified repair shop !
Functionality
With the ignition switch in the RUN position, voltage is applied through the warning indicator I circuit 904 (LG/RD) to the voltage regulator. This turns the regulator on, allowing current to flow from battery sense A circuit 35 (OG/LB) to the generator field coil. When the engine is started, the generator begins to generate alternating current (AC) which is internally converted to direct current (DC). This current is then supplied to the vehicle's electrical system through the output (B+) terminal of the generator.
Once the generator begins generating current, a voltage signal is taken from the generator stator and fed back to the regulator S circuit 4 (WH/BK). This voltage feedback signal (typically half the battery voltage) is used to turn off the warning indicator.
With the system functioning normally, the generator output current is determined by the voltage of the A circuit 35 (OG/LB). The A circuit 35 (OG/LB) voltage is compared to a set voltage internal to the regulator, and the regulator controls the generator field current to maintain the correct generator output.
The set voltage will vary with temperature and is typically higher in cold temperatures and lower in warm temperatures. This allows for better battery recharge in the winter and reduces the chance of overcharging in the summer.
Battery Positive Output (B+) Circuit 38 (BK/OG)
The generator output is supplied through the battery positive output (B+) terminal on the back of the generator to the battery and electrical system.
I Circuit 904 (LG/RD)
The I (ignition) circuit 904 (LG/RD) is used to turn on the voltage regulator. This circuit is powered up with the ignition switch in the RUN position. This circuit is also used to turn the charging system warning indicator on if there is a fault in the charging system operation.
A Circuit 35 (OG/LB)
The A (battery sense) circuit 35 (OG/LB) is used to sense battery voltage. This voltage is used by the regulator to determine generator output. This circuit is used to supply current to the generator field (rotor). The amount of current supplied to the rotor will determine generator output.
S Circuit 4 (WH/BK)
The S (stator) circuit 4 (WH/BK) is used to feed back a voltage signal from the generator to the regulator. This voltage is used by the regulator to turn off the charging system warning indicator. The S circuit is fed back externally on external mounted regulator generators.
Visual Inspection Chart Mechanical Electrical
  • Battery case, posts, hold-down clamp, cables and connections
  • Generator drive (serpentine) belt for condition and tension to make sure there is no slip between the belt and the pulley. For additional information, refer to Section 303-05 .
  • Battery charge
  • Generator pulley
  • Battery junction box (BJB)Mega Fuse
  • Battery junction box fuse:
    • 11 (20A)
  • Central junction box (CJB) fuse:
    • 30 (30A)
  • Circuitry
  • Charging system warning indicator
  • Cables
  1. Check the operation of the charging system warning indicator lamp (instrument cluster). Normal operation is as follows:
    • With the ignition switch OFF, the charging system warning indicator should be OFF.
    • With the ignition switch in RUN and the engine off, the charging system warning indicator light should be on.
    • With the engine running, the charging system warning indicator light should be off.
  1. Verify the battery condition. Refer to Section 414-01 .
Normal Charging System Voltages and Charging System Warning Indicator Operation Ignition Switch Position A Circuit 35 (OG/LB) S Circuit 4 (WH/BK) I Circuit 904 (LG/RD) Generator B+ Circuit 38 (BK/OG) Battery Engine to Battery Ground Charging System Warning Indicator Operation OFF 12 volts 0 volts 0 volts 12 volts 12 volts 0 volts Off RUN-engine off 12 volts 0 volts 1-3 volts 12 volts 12 volts 0 volts Illuminated RUN-engine running 13-
15 volts 1/2 battery voltage 13-
15 volts 13-
15 volts 13-
15 volts 0 volts Off
  1. If the customer concern is verified after the initial inspection, refer to the Symptom Chart to determine which tests to carry out.
    • The charging system warning indicator is on with the engine running (the system voltage does not increase)
    • Circuitry.
    • Voltage regulator.
    • Generator.
    • GO to Pinpoint Test B .
    Your whole problem is the alternator is not charging , a couple tests with a volt meter would tell you !

Aug 16, 2015 | 2001 Ford Expedition

1 Answer

Noticed battery and brake light on my 01 montero sport lxs. Was told I need a new alternator. My car never died nor had a problem starting. Is there another reason for those two lights to be on?


As a first step to checking make sure your battery is full of electrolyte and give it a full charge to see if that causes the battery light to go out. The two lights may not be connected to alternator fault. If, when the battery is full charged, the battery light goes out and stay out you will have got to the bottom of the issue. You need to do this as soon as possible because the brake warning light is a major issur, If charging the battery cures the battery warning light but not the brake light then you have a brake problem.
If charging the battery puts both lights out and they stay out then it is probably as the garage argues.....there is no reason for a lrake light to go out if no brake work has been done.
You are o a path of investigation that must be carried out quickly in case the brake warning light is a valid warning.
Wouldn't drive too far or fast till you have resolved the matter


good luck

Jul 04, 2015 | Cars & Trucks

1 Answer

Suzuki troubleshooting


Check your belts, if they squeal they may be to warn to charge your battery at higher speeds. I would check to see if they are warn or need adjusting.

Dec 08, 2013 | Cars & Trucks

1 Answer

2000 jetta warning light ligtning bolt


Check your battery charging rate. A possible alternator or battery failure.
If the battery is charging at around 14volts, then replace the battery.
If its charging anywhere below 13.5, then replace the alternator.

Nov 03, 2012 | 2000 Volkswagen Jetta TDI

1 Answer

Battery light and abs light is on and battery wont stay charged, new battery and altenator is good


This sounds like a bad alternator , maybe it charges at times and other times it does not, check connections to battery and at alternator, also make sure all fuse are good.

Oct 06, 2012 | 2001 Ford Taurus

2 Answers

88 Izusu Trooper II with 274000 miles Battery warning light comes on when first starting and running- after driving awhile, it goes off and starts charging- also during the warning period- the blower


Sounds like your battery isn't charging properly, first thing to check, is your alternator belt slipping, is it tight enough, if so does it need replacing?

Next the battery, if its over 2 years old it could be on its way out. Does it hold its charge?

Finally, Alternator, is it still providing a charge for the battery? Are all electrical connections good and clean?

Nov 07, 2011 | Cars & Trucks

1 Answer

My toyota hiace is 1986 model 2,4 and diesel.the problem is the battery lamp warn and the battery dicharge all the time , and the generator is together whith oilpump and where can i find the generator...


Hi,
If your charge warning lamp is coming on then you have a problem with the alternator. You need to replace it with a reconditioned item or new item. The charge lamp relay is operating ok because the charge warning lamp is coming on.
Have this done and your battery will stop going flat.
Thanks
Jason

Jun 10, 2011 | Toyota Pickup Cars & Trucks

1 Answer

ABS malfunction warning light on Airbag malfunction warning message Battery not charging Message No power steering battery totally flat


This time of year alot of batteries fail because of the cold but a bad battery will not turn on the charging light. This usually only occurs when the alternator isnt charging. When the battery drains enough its possible thats why you have these other issues.
Codes only set when the computer does not see the correct voltages

Dec 20, 2009 | 2004 Saab 9-3

1 Answer

Warning lights stay on


Hi,

Brake light warning indicates possible low brake fluid in the reservoir;

Charge warning light indicates battery not charging which can be caused by defective alternator/regulator, slipping belt, corroded fusible link from alternator to battery B+ terminal.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

May 24, 2008 | 1988 Toyota Pickup

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