Battery is good but car is dead and wont turn over

head lights must come on, or the battery is dead.!!!
the head lights work key off. so that is first check, and first to fix.

when this happens you have a dead battery, (fuses good, and tested all fuse,in engine bay.

1. the classic, jump start using jumper cables .
2. charge the battery so it reads 12.6vdc rested
3. try a known good battery in car, that works in another car.

easy, right?

This may be related to the antitheft system The system is known for turning off the starter and/or injectors when it fails. Is there a light on the dash that says SECURITY or a picture of a car with a lock through it? This is a common problem worth looking into. http://www.diy-gm-security.com/

> the key would not turn in the door-lock

Are you sure that you are using the correct key?
Did you recently separate/divorce from your partner/spouse?
Did the ex-spouse have the car "rekeyed", so that the "old" keys no longer work?

Did you recharge or replace the dead battery?

Blew a fuse is likely problem, especially if you did not jump it correctly. Cannot tell you how many times I have walked up to people in parking lots to potentially save their life and/or limbs. Connecting a dead battery to a live battery wire to wire is just plain dangerous. Start at the dead battery. Connect the red cable to the red (+) terminal on the dead battery. Connect the other end of that cable to the red (+) terminal of the live battery. Connect the black cable to the black (-) terminal of the live battery. (CAUTION: Before making this connection, make sure the other end is not touching a ground). Finally, connect the last connection to the dead battery's car on a good unpainted grounding point away from the battery if at all possible. A usually good point to use is the area where the hood latch is located. Small sparks will let you know it is a good ground. Start the live battery's car. Let it run for about 5-10 minutes with all lights and accessories turned off in both cars. Now attempt to start the dead battery car. Disconnect in reverse order. Good luck and be safe.

My first guess would be a dead cell inside the battery, or a blown fuseable link between the battery and the fuse box.
Someone would need to check the battery connections and fuse box with a meter.

Have the battery tested first, this sounds like a dead cell in the battery.

make sure your battery is good. turn on your lights, if ok for a good minute or two, your battery is ok, but if nothing turns on you have a dead battery.

if the battery was tested and reads good then where i would go next would be the starter, some times the starter gives you a false signal the battery is dead. i would check all of your connections to the starter if there good test the starter some time tapping on the starter will help. tap on the starter and try to start the car at the same time if the car turns over then you will need to replace the starter, that is a sign it's at the end of it's life.

Hi,
first check all you connections from the battery especially the earth wire,if all good suspect the starter motor is faulty and have tested.

On many cars, if the battery is dead, it locks the key in the ignition. Put a battery charger on the car or replace the battery and give it a shot.

Good luck.