How To Trigger Car Alarm. Most car alarms are triggered by vibration or motion. This sensor monitors the static voltage of the cars electrical system and triggers the alarm when it senses a drop in voltage such as when a door or trunk is opened and the interior lights go on.
Drivers can purchase a passive or active alarm system. The active alarm initiates automatically usually several minutes after the ignition is turned off or after the car. On the vehicles that have two separate - door triggers that are isolated from each other most commonly found on newer GM vehicles you will need to use two 1 amp blocking diodes for all doors to trigger the alarm.
If a switch is triggered for example if a door is opened the alarm will sound.
This means that do-it-yourself alarm programming can save you a lot of money which would have otherwise gone to a mechanic and you will have a better understanding of auto safety for having programmed the alarm. Mark shows you a trick he has used to stop this annoying condition. What triggers a car alarm. I asked automakers how the alarms on their 2016 models work.
