Driver side door lock

[Sonyps307]

When I go to unlock my drive side door it will set off my alarm almost every time so what could be causing this a bad door lock switch

[Green7mgte]

a twenty year old alarm system.

there was a pretty in depth thread about the alarms and how to uninstall it floating around here someplace.

[Sonyps307]

Well the alarm system works fine the pass. Door works and turns it off it's just something with the driver door it just sucks to unlock it by the pass side every time

[btwilson86]

I would assume the door lock switch (or w/e it's called, the one that "sees" you unlock the door). Sounds like the alarm is armed, but it doesn't know that it's being disarmed

[Bru]

This was one of the first things I had to fix on my Supra 15 years ago. It involves taking out the lock cylinder. Underneath the electrical wheather cover there is a quarter moon shaped piece of copper that becomes detached from the plastic rivet locating pin. In other words when you turn the key the copper quarter moon shaped piece doesn't move so the alarm is not disarmed. Repair by carefully doming over the protruding white plastic locating pin through the copper quarter moon shaped piece to retain it. There's not much of the soft plastic to work with so use something like the tip of a small screwdriver but don't overdo it or you will have to get another lock cylinder. Reassemble and it should work after that.