Car Alarm Drain Battery. Pop the hood and locate your vehicles battery. This on mode is automatically triggered when the car is locked.
Some key alarm systems can and will drain your battery if the Car is rarely driven especially if there is a ignition kill switch wired into the system. In order to accurately detect the parasitic draw you need to begin with a fully-charged battery. If the alarm was factory installe.
There is a button to the left of the steering wheel that did blink when the battery was dead.
So if you often face the drain car battery trouble its probably the time for purchasing a quality battery. A partially charged Battery can make the alarm system malfunction. A car alarm can drain the battery over time because it requires power from the battery to power its electronics whether in standby mode or triggered. A clock in the radio draws as little as 001 amps whereas the combined interior lights can exceed 1 amp.
