Amp draining battery overnight.have new battery and new alternator.switch off everything and still draws amp flatting battery

Make sure the battery is good. U can charge it and disconnect it from car overnight and see if it works the next day. If it is still fine then the car has a drain. If no good, then the battery is bogus and cannot hold a charge.

U have something in wiring that is draining the battery after shutdown. Need an ammeter. Hook it up to the battery and wait about a half hour. Then notice draw on meter. Start removing fuses until you locate the line that is responsible for the draw. Then check out each and every item on that trunk line.

Sounds like u need to check for battery draw...something is keeping power coin when car is off and draining battery...
Also may wanna check alternator for charging...

there are several reasons...not enough cells in a weak battery(not enough cold cranking amps in battery to turn the car over). Check your alternator as well. Does the temperature drop? Sounds like you need a new battery(also when you turn off your car- TURN OFF EVERYTHING...sometimes a radio, or something not turned off(even a trunk light, interior light, security system(various things)- can zap the juice from your battery overnight or within hrs.-leaving not enough to start the car the next day....Hope that helps....Xx, Jasmine

Make sure battery surface is clean and dry. No liquid or fluid !

Mai Lor

Buy new battery
ampifiers take little current to rise the voltage
also look for unwanted bugs xD

I have done this before, put about a 10 amp charger on the battery. Pull the courtesy light fuse first. Look at the battery charger, it is probably charging several amps, pull one fuse at a time. When the charging amps drops down you found the fuse the controls the problem. I had a car several years ago that someone pulled the seat belt all the way out, somehow it was pulling a load and draining the battery overnight.

For a battery to go dead on you like that there must be something draining the battery while the vehicle is switched off. It could be something like a trunk light which is not switching off or a short across some circuit that does not show up on any light. The first and easiest test is to disconnect the battery negative cable whenever you park the vehicle overnight etc. and see if the battery still runs down.
As a more positive step and if this does not affect the alarm, disconnect the positive lead from the battery and wire a bulb like a tail light bulb, between the terminal and the removed lead. The bulb should light up. Make sure that everything on the vehicle is switched off, the bulb should still be lit. Remove and replace the fuses one by one until the bulb goes out. That is the circuit that is running your battery flat. Check all the components on that circuit until you get the light to stay out and your problem should be fixed.
Check your charging system. With the engine running at about 2000 rpm, a volt meter across the battery terminals should read around 14 to 14.5 volts and drop to about 13.8 volts with the engine at idle. If this does not happen, the charging system may be defective. Even with lights on the voltage should climb, but will drop lower at idle.

Either something is draining the power or your alternator is not recharging your battery. Do you have a DC voltmeter? With the engine running check the voltage accross the battery it should be about 14 volts. If it's down around 12.5 volts with engine running the alternator is not working. If you determine the the alternator is working and the battery goes dead, then there is a draw on the system. It could still be the alternator though, there are diodes in the alternator, a diode acts like a one way gate for electricity. With one bad diode the alternator will still work but, when you shut the car off the alternator drains the battery back down. Something is drawing it down, without testing equipment, you'll have to take it to a shop. Something you could try, after the car has been shut off for while, an hour or more, go feel if the alternator is warm or hot, if so it's drawing the battery down. Disconnect the battery overnight so it doesn't go dead on you.

Connect a 12 volt DC test light between battery cable & post on positive terminal.(remove terminal) (inline) When that light is on, there is a draw. Radio memory, alarm/antitheft systems, etc will cause a draw, so make notes & pull them first. Light will be dull on low draw, bright on high draw. Watch light closely & start pulling fuses, when you see it dim down,or go off you;ve found a draw. If no change, put it back in & continue. I usually start with the suspected draw spots like listed above, and accessories fuses.(like a cigarette lighter stuck in.) If all else fails, I've had to remove all the fuses then start replacing one at a time, until light gets bright, to point me in direction of major draw. Don't be proud, if you don't think it's labeled well enough for you to remember where they all go, make your own drawing & notes. Keep me posted of your progress.

Check the battery for charge and alternator for power (free at Autozone) It might be deposited/rusted contacts on alternator and battery to reduce the electric current to battery from altrnator so battery just draining out. Also if it is very cold overnight (less than 0 F) battery lost the cranking power.
Please kindly let me know if the information provided was usefull for you or you need more info
Good Luck