So.....when all doors are locked from key fob, and little red light is blinking, there is no horn sound when you try to open any door. However.....when you leave passenger side door unlocked, but the key fob locks all other doors, and you try to open any of the locked doors, nothing. But open unlocked door, the horn alarm starts to go off till you disable with key fob. Really.....what the hell is going on??

 

How are you leaving the passenger side unlocked when you're locking the other doors with the key fob? Seems to me that should lock all the doors, unless you're opening the passenger side after the locking event.

 

Currently, the key fob only locks all doors, except rear right passenger. When key fob alarm is activated, only the unlocked passenger door will sound horn when an attempt is made to open. Not the other locked doors, as they will not sound the horn when an attempt is made to open them. Weird.