Need help disabling auto locks

My parents have a 93 'Burb and they'd like to disable the automatic locks that engage when the truck is moving. I'm sure it's one of those ignition codes, but haven't found it on the net anywhere. Does anyone know the steps or know if it's in the Haynes manuals?

Thx

There are many different types of auto door locks. Some operate on negative pulse edges, some on positive. One way to get info is to look at information from Remote Starting Kits on the web. They have wiring diagrams to deal with this issue.