It might also be a malfunctioning alarm/auto security system to me. Nagloloko yung unit on sudden power surges causing it to trip the main power relay (sa ignition switch) and sending commands to the door actuator.

Try borrowing an alarm module from someone who has the same one then kabit mo (borrow their remote of course). Run the engine then use the flasher or repetitively switch the high beam on and off.

Baka lang ha?