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Re: 1998 Corvette drains the battery in less than 2 days.
No, corrosion will not cause a battery to drain, even if the corrosion is on the terminals. Several factors can cause battery drain, I would first have the battery tested to see if the battery it self is not bad. If the battery is good, then the most common is a short. All most all new cars have a certain amount of drain,(measured in milivolts) this drain is for clocks and computer memory's, and it would take several days of a vehicle sitting for the battery to be drained. Don't immediately assume you have a problem if you see 2-6 milivolts of drain on a battery with the key out, now if your battery is being drained after being parked over night, you have a problem. The easiest way to pin down the problem short is to disconnect your positive battery cable from the battery, take a 12 volt test light and clamp one end to the positive cable, and hold the probe to the positive post. Now if you have a short the light will come on. Have someone help you by pulling the fuses one at a time. If when a fuse is pulled the light goes out you have isolated the short to that system. If you pulled all the fuses and the light never went out try disconnecting all the wires from the alternator, 9 times outta 10 do this will let you know where your short is. If the system is not critical like power locks some people just leave the fuse out.
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1. IF you have been driving it then the alternator may not be providing the power needed, the system is drawing on the battery and the battery is not being charged either when the engine is running. You should have the alternator checked.
2. If you alternator is good and the car has just been left sitting and the battery has drained then you have an excessive electrical load drawing power from the battery whilst the car is turned off. . It does not take much to drain your battery so you cannot start the car in just a day or less. A power widow motor or power seat motor that has power switched to it because the switch is bad is enough to run down the battery leaving you with insufficient power to start the car.
First you can not test an alternator by disconnecting the battery cable. That is what we did back when cars had generators. Today you can fry the computer and alternator running the engine with the battery cable off. Meanwhile, I would look for a fuseable link or main fuse problem. The alternator circuit may not be connected to the fuse box and battery.
You didn't mention how far if any you drove since installing battery. First jump start, put voltmeter in battery while idling - should read 13.1v-15.8v. Anything less, replace alternator. If good, load test new battery.
the battery is no good have an AVR test done,if it is good there is a fusible link that goes to the feedback circuit on the alternator in alot of cars.if the alternator went,it could have blown the fuse link.if you put a charged up battery in there it will run quite a while. but the battery could have been bad and thats what took out the alternator...the other thing you may want to look for is something draining the battery,disconnect the terminal,and put a current meter in series.it should be 1 to 2 milliamps only.sometimes a glovebox light,trunk light etc,drains the battery.
the problem with my malibu was the plug going to the alternator. i went to the junk yard and cut a plug end off the wiring harness and replaced it on mine and it's been working fine. i don't know why it drains the battery with the broken wire in the plug, but it did. i found the problem by wiggleing the wire while my wife watched the dash for the battery light to go out. ken!