Question about 2004 Volkswagen Passat

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Alternator light came on and vehicle started acting like it wanted to go dead

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Take it to autozone to check battery and alternator

Posted on Oct 06, 2010

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Whenever your car won't start, it is either fuel, spark, or air. In your case, because it died while driving and won't run very long, I think it's spark. I would guess that your alternator is no longer providing enough voltage to charge the battery, hence your battery acting like it's dead, and your car not wanting to run long when you do get it started. Use a multimeter to check the voltage coming from the alternator when the car is running. It should be 14.5V or so. If it is down around or lower than 13, replace the alternator.

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Is the alternator charging on the vehicle? It might be new and work on the bench, but if it is not getting the power it needs to make power on the vehicle then it will not charge. With the vehicle running you should have around 13.5v at the battery at idle. If the alternator is not replacing the power being used out of the battery it will act exactly like you have described.

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Alternator good battery good still not starting dead no charge


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Car runs while driving volts light comes on and speedometor jumps back and forth car will die try to restart car acts like battery is about dead then it starts go a little ways and does it again


Sounds like the alternator is not charging the battery-not working at all. Have your alternator tested. When running, the alternator should be supplying all power to run the cars' electricals and charging up the battery for when it is needed again to start the car. If the car is running on battery power only, it will quickly run the battery down.

Feb 20, 2013 | 1997 Chevrolet Lumina

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94 saturn sl1-went out to start the car tonight, and it acted as though the battery was dead. got a jump from a neighbor, and car started just fine. however, when I turned on the heater blower, the car...


Sounds like the alternator / voltage regulator is malfunctioning or there is a bad connection to / from the alternator / battery.

Do you have a multimeter so you could test the alternator -- or could you take the car to a parts store such as Auto Zone where they could test the alternator for you ?

Charlie

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My battery light is on my dash. losing power while driving. radio shuts off lights go dim wipers start moving on their own. then car goes dead. once u get a jump starts up. replaced starter alternator and...


Sounds like your voltage regulator is acting up, and at times will not let alternator voltage reach the circuit. At this point car stars drawing on battery alone (triggering battery light) and working until it is out of juice. Before you buy a new voltage regulator, make sure that its contact points on the alternator, and the plug from it to the vehicle circuit is clean, shiny and making good contact. These parts, due to their location tend to collect dirt and moisture, leading to an intermittent performance before they stop working completely.

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2002 F-150 regular cab. Idling seems like it wanted to die. While driving would rev up and down wanting to die. Finally died at a red light and had to be towed home. In the driveway it acts like a dead...


From what you describe, it sounds like your alternator died. The battery's main function is to provide power to start the vehicle. Once started, the alternator takes over and provides the main source of power to the truck, and also recharges the battery.
When the alternator stops working, the car starts to run solely off the battery. It will work for a little while, but as the battery starts to lose power, strange things will happen with the electronics. The computers and other electronics that control the vehicle are very dependent on a constant, steady flow of voltage. When that voltage dips below 11 or 10 volts, the car may start to run badly or strange things may happen with electrical system.
When there was finally not enough power to keep the car running, it shut off. Of course, once this happens, there will not be enough power left to start the truck back up.

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2004 eddie bauer expedition problem


bad battery with dead cell
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