The car alarm quit working..battery went dead in vehicle and everything stopped working

Check the battery cables for clean and solid connection.

use the car key itself from outside the vehicle with everything closed: use key in drivers door outside door lock and manually lock and unlock the door. check if fixed, may have to do a few times. i do believe the vehicle is in theft mode.

Find your alarm module, it is a black, rectangular box with an antenna wire on one end. Remove any ties or fasteners holding the alarm in place and take it out from under the dash.
All you need to do is simply remove the two connected wires to the ignition switch, and connect it with the car side of the two together. This enables the ignition switch and that enhances the control over the starter again, without hindrance.
For further help and assistance contact Eurobahn BMW MINI Mercedes-Benz Audi of Greensboro.

That's the way batteries do. One day they are fine and the next day they are dead. NOBODY can tell you online WHY your battery went dead. The battery itself could be bad, or maybe you left something turned on. There is no way that anybody could know that without checking your vehicle.

Please check the relay and solenoid for malfunction.
Regards

start the car. if that dose not work remove ground form battery then after it stops put ground back on that will reset the alarm.

you are in valet mode.
find valet switch under dash or driver kick panel.
turn key on
then push the valet switch for a few seconds.
light should go out and then function properly again.

Assuming that all is well with the vehicle's electrical system (fuses, etc...), the following should work, as Viper/Clifford uses the "fail safe" method of starter disable, and it only works to lock out the starter when the alarm is functioning properly and in the armed state.

That system has a "starter kill" system. When the alarm is actived, the starter kill is engages, and won't let the starter get voltage from the ignition switch. First thing I'd try is connecting the car's battery while the ignition key is turned to the "on/run" position. Cycle the alarm to arm, then disarm, so that the LED is not blinking. It also may require using the manual override button/switch (with the key on) to reset the alarm. Should start after that.

If all else fails, reconnecting the starter wires back together (they are spliced and running through the alarm via a SPDT relay.

Sounds like you have a shorted wire causing a drain. I recommend disconnecting the alarm all together which should stop the short so battery can remain fully charged.

my is doing the something because i don't have a remote to the car now when i get out of the car my alarm is going to be on and when i get back in to the car the alarm go off to a start the car. i have to keep one of the door open and if i don't the keys are going to be lock in there. I just get a remote for the car but i have to get someone to get it to work with the car i hoping it going to stop everything. I have a lot of trouble with this car. I just want everything to stop.