2000 jaguar s-type. The problem is if parked overnight, the battery is dead the next day. have new battery, alternator is charging to battery at 14+ volts. is it possible ignition switch is not fully turning electronics off when removing key?

Have you had the alternator check for a bad diode it may not put out enough to keep the battery charged after 10 to 14 days. The bridge in the alternator could be weak. Hope this helps.

If goes dead while driving not charging possible bad alternator. If goes dead regardless of driving probably a power drain somewhere. Easy way to test alternator is test battery voltage with a multimeter and make sure at least 12.5. Start car check voltage again and see what it is shot be around 14. If not alternator is most likely bad.

Yes and no.
It sounds like you have a wiring problem.
The alternator output could be 14 volts and only one or two amps, but that would be enough to kill the warning light. Its more likely the alternator is charging but the current is not reaching the battery.

SOMETHING IS DRAINING IT OVERNIGHT, TRY DISCONNECTING 1 THING AT A TIME SUCH AS ALARM, CENTRAL LOCKING RADIO ETC.

its eaither a bad bettery, or a bad alternater, cuz the battery will hold some charge but if the alternater dont charge the battery it wont last long, hope this helps

You didn't mention how old the battery is but it could be that it has reached the the end of it's life. Just about anyplace that sells batteries will test it for free. As for a draw, it is possible for any number of things to run down the battery overnight including the diodes inside the alternator. (yes it can make a charge and still have a bad diode) Even the battery itself can be internally shorted. To determine if something in the cars electrical system is causing the draw, the next time you park it disconnect the battery, if it is dead the next day...viola' you have a bad battery. If not you have some more work to do. Try step one and if that doesn't get you anywhere, get back on here and we can go over what to do next.

When the car is running check the voltage at the battery. You should see 14 volts. If you see around 12 volts or less the alternator is not charging.

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Check and verify that your alternator is charging properly, if you hook a multimeter up to your battery you should see a voltage between 13-14 volts on the charging side, if this is the case your alternator is good, next i would check the resting voltage of your battery that should be tested with the car off and it should be between 12-12.5 volts, if all of this checks out i would start looking into the parasitic draw on your battery while your vehical sits overnight, make sure all your courtesy lights are going off, your glove compartment light any under hood lights things like that if any lights like this are remaining on you will have a dead battery day after day because the light or draw on the battery keeps draining it of its charge....

check the connection between the starter & alternator. It may be loose.

Make sure the car is not draining the battery while parked and shut off.
Place a meter across the battery, it should read 12 volts when charged up.
Start the car and it should climb to and read 14 to 14.5 volts. If it doesn't, then the alternator is bad.