2000 Accord LX 4-dr 4-cyl

Randomly throughout the day, whether the car is driving or parked, all 4 doors lock and unlock together. I thought this was related to my aftermarket car alarm so I had it disconnected, but the problem has continued. Obviously this is annoying because my car will unlock itself in the middle of the night! I haven't been able to detect any pattern as to when or how often it happens.

From reading other posts I'd guess that it's related to the actuator(s), but most other people were reporting issues with just one door and I've only seen it happen with all doors simultaneously. Thanks in advance!