Battery drains overnight

Hi Nelly:
I'd bet a bag of popcorn against a weekend at Pizmo Beach that the battery needs replacing or the terminals or connections are corroded.
First step - dis-connect NEGATIVE battery terminal.
Second step - disconnect Positive battery terminal.
Third step - Put battery on charger for at least 3 hours, preferrably overnight..
Fourth - CLEAN all connectors and terminals
Fifth - Re-install battery Connect POSITIVE terminal first and Negative last.

Try to start. If No go, try using jumper cables.
If it starts, Go buy a new battery, and a bag of popcorn.

Check that all your ground wires are well attached and attaching points are clean and free of corrosion. Also check for parasitic drains such as an underhood light, trunk light, map light, floor lights, something plugged into dc outlet like a cell phone charger left plugged in, etc. is not draining your battery overnight or over time when parked.

next is jumper cable jump start to good running helper car battery.
that cuts cause in 1/2 , 15min works.
car starts, your battery is bad, or not charging, running, or is only discharged. (left head lights on)
wont crank. now?\\
hot wire the solenoid, for cutting possibles in 1/2 again.
what transmission? in car?

see tricks here. (and the hot wire trick)
http://www.fixkick.com/nocrank.html#tricks

Most likely you have a bad connection somewhere. Trace the battery cables and clean/tighten all terminals or try jumping to a different lug. You might also try removing the starter and jumping directly to the starter to verify that it is good.

Charge the battery fully, clean the battery terminals and then try to start.

This may not be a complete solution, but surely a place to start. Take the battery and get it tested. If it's fine, but the truck starts like the battery is dead... this is a great indicator that your starter is pulling WAY too much current. This could damage your battery, so replace the starter. Starters can also be removed and tested by your parts store before committing to a purchase. They are both easy enough to remove, you could take them both in and get lots of answers right away. If you have glowing wires, you should replace them as well as check all major wires from the battery to the starter, ground, starter relay, etc. before placing any new components in the system. Make sure your battery terminals are good and clean as well... this won't prevent shorts, but will be good maintenance while you're under the hood. Good luck!

Check your battery terminals and make sure they are clean by removing and lightly sanding with some rough sand paper (wipe down when finished), also the wires/cables going to them, they should not move when tightened on terminals. Also clean and tighten the negative (earth) cable/wire and if you have easy access check to see if the main starter motor lead is tight, be careful if you need to tighten it as you can short out the positive (starter motor lead) with the negative (anywhere on car thats metal 95% of it). You have poor connection somewhere which is causing your problem.

it could very well be a starter but first i would test the battery and see what it reads should be at least (12.75) or so depends on the battery and if that is good then i would check the battery cables to see if they are loose or corroded if they have wires showing and you see white or green residue on them its time to clean them you can use a wire brush and clean the terminals at the same time then reconnect them and if it still doesn't work i would test the starter solenoid and the starter itself

Sounds like you have a weak battery or corroded battery terminals. Make sure the battery terminals are clean & tight. If it still doesn't start, have the battery & starter tested. Hope this helps :)

This should be done with everything turned off and the door closed. with negative battery disconnected. place 12 v test light between the battery terminal and the cable end.(on neg. side) if the light lites up there is a drain. remove one fuse at a time until u see the lite go out. that is the sytem the drain is on. usually glove box light or trunk light or visor light left on or stuck on.