Crispy Actuator

Okay, so I learned that car door lock actuators hate to have constant power applied to them for too long (accidentally)! Ahhh.....the sweet smell of burning plastic.... Anyone bring marshmallows? (sigh)

Using a relay module to control the actuators. What I believed was setting the pin to LOW actually read as HIGH on the relay (on the N.O. side). Hmmm..  More actuators.