Hi all! New here and am going nuts trying to figure out why my doors started locking by themselves when i turn off engine and leave key in ignition and shut door? New battery, awhile back. And still tests as new? I have to make sure window is down anytime i get out and turn eng off. I live in the middle of nowhere and no one takes their keys out of the cars. Any farm around has keys in every vehicle. My kids been locked out several times and its getting to be a problem. I have talked to others and checked online and the passlock system will not cause the doors to lock, just keep car from starting. Any help would be greatly appreciated. Thank you very much and hope this is a good place to get info!

 

Does this truck have a remote keyfob?

Any codes related to the class 2 data bus?

Exactly when do the doors lock? What happens if the key is out of the ignition?

George

 

No key fob, no codes and doors lock within a minute or so after shut off. If i leave key in or not.so anytime i shut off blazer and go in house or store or overnight regardless if key is in ignition or my pocket, when i go back to blazer its locked

 

So this a delayed event completely independent of key in the ignition or the doors being closed? How about if the truck is running?

George

 

Even running it will lock

 

Anyone have schematics for the 93 power lock system?

Without a schematic, I would start going around to the various lock switches and make sure that they are in their neutral position. Try pulling the switches and disconnecting them to see if the problem persists. If it goes away, then plug each one in individually and see if it comes back.

Given the age, it is possible that one of the switches has an internal issue.

 

Attached.

George

 

thank you ill give it a try

 

will s10 be the same as full size 2 door blazer? And thank u