Could door locks going on and off drain battery when car is off.

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. Sure, if the door locks constantly cycle, the battery could drain. I would question why the door locks are cycling. I don't believe the switches or actuators are issues. Does this vehicle have some kind of 3rd party alarm system or mechanism attached to it that could be contributing to some kind of lock actuation? This is a concern I would bring to a professional technician near you to be sure. It will be relatively easy for a technician near you to learn what is causing the locks to engage -- and find the draw to the battery. https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.