help needed..battery drainage
05-27-07, 09:48 AM
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help needed..battery drainage
hey everybody i need sum help with my fc.. sumthing is draining my battery when the car is just sitting there..it was a brand new battery and got 99% drained within 4-5days sitting under the hood..the first 2 days i used it 2 start my car up.on the 5th day i went 2 start it up and u could tell the battery had been drained of its energy..i have no idea what is draining my battery. and i need the all inputs on wut the possable problem could be. thanks 4 the help.
05-27-07, 10:48 AM
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Sounds like you need a new battery... but I am guessing that’s not it.
If you have been driving it, it could be your alternator. You may also have something drawing when the car is of. If you don't already have one, get your self a Volt meter/digi meter whatever you guys call them then do a search because somebody posts about this problem almost every day
If you have been driving it, it could be your alternator. You may also have something drawing when the car is of. If you don't already have one, get your self a Volt meter/digi meter whatever you guys call them then do a search because somebody posts about this problem almost every day
05-27-07, 02:38 PM
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What you need is an Ammeter. It should have at least a 20 Amp range. Disconnect one battery cable and put the ammeter in series between the battery and disconnected cable. Start with the higest range on the ammeter to protect the ammeter. Decrease the scale of the ammeter until you can read the current (Amps).
Then start removing each fuse one at a time. When the current indication drops you have found the gilty circuit.
If you show a small current drain when engine is off, the battery is probably sulphated and will not hold a charge for an extended period.
Then start removing each fuse one at a time. When the current indication drops you have found the gilty circuit.
If you show a small current drain when engine is off, the battery is probably sulphated and will not hold a charge for an extended period.
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05-28-07, 03:34 AM
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I wouldnt suggest starting the car with a ampmeter in series, this will no doubt destroy the meter or should blow it's fuse if it's a good meter.
The cranking amperage of the starter is far greater than 20 amps.
Also, don't pull a battery connection once the car is running. Damage to the alternator can occur.
You could use it to check for drainage when the car is off with no problems.
If the meter is showing more than say 5-10 milli amps (10ma), start to pull fuses one at a time while watching the meters reading to drop and locate the problem area.
I doubt it will ever go as far as zero.
I'm not sure what a normal system draws in stand-by to run the clock or stereo but its not much.
The cranking amperage of the starter is far greater than 20 amps.
Also, don't pull a battery connection once the car is running. Damage to the alternator can occur.
You could use it to check for drainage when the car is off with no problems.
If the meter is showing more than say 5-10 milli amps (10ma), start to pull fuses one at a time while watching the meters reading to drop and locate the problem area.
I doubt it will ever go as far as zero.
I'm not sure what a normal system draws in stand-by to run the clock or stereo but its not much.
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