Look under the hood for a round black switch along the edge of the inner fender, right under where the edge of the hood meets it. If an alarm switch is used, it is usually on the driver's side. Unplug that switch. If that solves the problem, I'll describe how to readjust it.
Next would be to connect a scanner to see if the disarm signals are being received. In most models there is a linkage between the lock cylinder in the door and the disarm switch that can pop off, then the switch won't do anything. Less common would be a defective switch, but you would still be able to disarm it from the other door. The scanner will also show the reason the alarm activated.
Friday, April 19th, 2019 AT 12:22 PM