The usual reason for drain is that the BECM keeps waking up for some reason, and thus keeps drawing power from the battery. The main reasons are that either the car is being affected by something giving off radio waves at a similar frequency to the fob, or that one of your door latches isn't working properly and keeps the BECM awake.
but that"s the problem i can't close the car with the remote. Only with the key. And than the turn light will not blink. When i disconnect the battery for the night. The next morning when i connected te battery again, every thing will work propperly. Event the remote works. Turn signals blink en the becm will go to sleep in seconds.
BUT, and now it come:
when i put the key in to start, without starting. When i than get out of the car and try to close the car with the remote, is't game over. Not the remote not the becm will go to sleep not will blinke the turn signals.
It's like there is a problem with the code in de remote and becm. One of the 2 is forgetting the wright code. Think i start with buying a new remote and see what it will bring.