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If you are certain it is not a faulty battery or alternator problem, the next step is to find what is shorting out or drawing current with the ignition in the off position. Could be a number of things: Have you had aftermarket accessories installed (shift light/digital gauges/stereo/amplifier/car alarm/etc?) that would be where id start first, then use a simple circuit tester.
Disconnect the battery, clip a lead on the + battery wire, any circuit that is drawing current will make the tester light up when you short the circuit/wire under the dash using the probe..this will only show you what can pull current when the ignition is off
Hope this makes sense
What else can I help you with?
What does it mean if your car needs to be boosted everyday but its not the battery or alternator?
Something is on draining your battery overnight. Any light or any relay. It can also be your battery has a dead cell draining it overnight.
94 Lebaron needs a boost every morning the battery has been replaced the clamps are clean and tight it does not appear to have any lights left on What is the cause of the battery draining?
Have you had the alternator tested? Often a bad internal diode can drain the alternator overnight.
Why does your battery keep draining on your 2000 Chevy Monte Carlo?
Defective alternator, loose alternator drive belt, dead cell in battery, or something is on pulling power from the battery.
What could be wrong with 1998 Chevy lumina you had a starter alternatnor and a battey put in but the battery keep draining?
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.
What is draining your van battery?
many things can do it suck as junk battery, junk alternator , or leaving anything on in the car
What drains battery on a 2000 Chevrolet impala with a good alternator?
Dead cell in the battery requiring a replacement battery or some light is on that is draining the battery. Can also be a stuck relay.
Why does a 2000 windstar se keeps draining the battery. i have tried changing all relays and a different battery.?
Your alternator is shot.
When a Car cranks but goes dead what could be wrong?
your alternator ain't charging your battery or a bad connection draining the battery
What is draining new battery and alternator on BMW 525i?
If the battery is brand-new and I would suspect either the alternator is defective or you have a lightbulb somewhere on the vehicle that is pulling power from the battery. It can also be a relay that is stuck.
Why does a 1997 Chevrolet Malibu battery go dead every night?
Either you have a bad battery or you have something draining it down overnight.
If you have to jump start your battery every time you cut your car off what is wrong with it?
Dead battery, Alternator not charging, Ignition off draw draining battery,.............
How can a new battery still go flat with new alternator installed?
If you install a new battery & new alternator and the battery runs down overnight then you have something pulling power from the battery. Look for any light on the vehicle that is on or a relay that is stuck.
