Short Answer: A faulty hood/trunk/door switch, low battery voltage, or a sensitive shock sensor.
Detailed: Car alarms trigger from:
Door/hood/trunk pinswitches — rubber boots crack, letting moisture in
Shock sensors (too sensitive — adjustable with a screw)
Voltage drop — an old battery dipping below 11V can trigger low-voltage alarm
Interior motion sensor (ultrasonic or microwave) picking up a fly or moving air from HVAC
Aftermarket remote start conflicting with factory alarm
Diagnosis:
Check the dashboard for a "door open" icon — if it flickers, a pinswitch is bad
Disable the shock sensor (usually a small box under the dash with an adjustment dial)
Test battery voltage overnight — if below 12V, replace battery
Put the car in valet mode (if available) to disable the interior sensor
Comments
Post a Comment