Why are my doors locking by them selves? 1992 mazda 929?

[JoanS]

I don't lock my car doors because the key doesn't unlock them. I understand that the locks activate when you put the car in gear, but the last 2 days, I had to call AAA to unlock it. It locked by itself while I was at work and again yesterday overnight.Could someone tell me why, and what can I do about it. Thank you

 

[MitchSmiles]

Just pull out the power lock relay. Then they can't lock themselves.

It is located under the dash behind the driver side kick panel

Here is a picture of it. Just pull it out and tape the connectors so they don't arch out on metal.