make sure ALL lights are switching off when car is closed up for the night...also, new radio system? is the Amp staying on all night? also, an old test is to disconnect the negative battery cable and connect it back up...but use a test light to make the connection...in other words extend your negative cable with the test light and touch it to your negative terminal... if the test light bulb glow, it shows there is a draw on the system(have everything turned off while doing this) when the light comes on something is on and drawing power...start disconnecting fuses...when you disconnect the cicuit that is causing the draw, you'll be able to pinpoint the problem... also... ...everyone should have a manual for their vehicle(parts store or dealer), and a local library should have professional shop manuals available in the REFERENCE section for free...make copies of the appropriate sections...read up and good luck :) Dead short somewhere. Test by turning off everything (even dome light, clock etc) pull fuses if you have to. Disconect pos battery terminal. Put 12v test light between battery and battery cable. The brighter the light burn, the worse the short. Isolate circuit by pulling fuses one by one.
A partial earth
Had the same problem. Bought a re-conditioned alternator, turned out it was bad. Usually if battery draining, it's alternator or battery or both.
your alternator ain't charging your battery or a bad connection draining the battery
could be alternator or charging circuit or could be anything got to do with the battery when its draining out loose connection terminal
There are a few things that could cause this problem. It could be the wiring to the alternator, the alternator solenoid, or the wiring.?æ
Try disconnecting the alternator, could be the diode pack
Could be an older battery that can't hold a charge any longer Could be loose or corroded battery cables not supplying a sufficient charge from alternator Could be a weak alternator not charging battery Could be excessive parasytic load drain to battery ( a fully charged battery should be able to hold a charge for 21 days of inactivity) Could be a hidden accessory left on draining battery (i.e. trunk light, glove box light, etc.) Could be a defective voltage regulator not opening on engine shut down draining battery.
Something is draining the battery. Check all lights. Glove box, trunk, etc. Also check the power window switch.
Something is usually on that you don't know about like an alarm could be draining the battery. However, If its not starting you should check the starter though. It will make you think the battery is bone dead.
The battery is worn out and needs ot be replaced depending on the mth warratny it has or the alternator is going out and is draining the battery . A simple check may be the battery cable . take the positive battery cable off while running as well if it dies it's the alternator .
If the alternator is installed incorrectly, yes, it can drain the battery.
something is draining the battery. a new battery will last a couple days if just starting the car. even if your alternator is bad.