This is not the same as the theft alarm (Horn honk + rear sound + light flashes) it is only the rear sound from trunk and no lights.
Does anyone know what this sound indicates? If I lock the car, the rear sound alarm will go off in about 30-60 seconds after locking it.Then it gets silence for some time and then continues a.s.o.
When I turn off the car, the "sharp" front lights doesn't turn off and not the rear red lights either. This has never happened before, the lighs normally goes off automatic. When dark outside and I start the car, the interior lights for all the ***** and stuff does not light up amymore, i have to turn the light switch to some position to get them lighting up now. I have tested to change the battery in both the key *****. No difference.
The car is now standing not locked on my parking, only way I know to not get this rear trunk alarm to start again.
Ideas?

 

Seems like a sensor is bad because the only reason the lights stay on without turning off automatically is if one of the doors or trunk is open. So if the car thinks one of the doors or the trunk is open it will beep and the lights will stay on.

 

Here is the solution for future references.

The error was due to old weak start battery. After replacing the starter battery everything worked out.

 

Thanks for following up.