THANKS DR. DIESEL
You are right, I checked the rear left door, apparently the plastic molding is missing and there is very little contact between the switch and the door. When I pressed the pin in, light worked and armed the doors.
THANKS A LOT FOR YOUR PRECISE HELP.
I got a question, I opened the door and pushed in the pin, while locking the door with remote. I let go of the pin, but car alarm didnt go off? Should it make horn noise?
What do you think.. is there a time delay?
Or, since the door pin was never pushed, the previous owner, disengaged the horn sound?
Also, while I had the pin pushed with hand, I pressed the remote and held the unlock button, however, window and sunroof didnt open with remote.