Hello

I have a motor-home built on an 2007 E450 Super duty chassis. It frequently will unlock itself. It has done it at 5:30 in the morning when no one was around and nothing was moving. It has done while driving down the highway. Two beeps and the doors unlock. I'll lock it and awhile later it unlocks.
I changed the batteries in the remotes but it didn't make any difference. I've moved the remotes far out of range and it still does it. I was wondering if it was picking up a spurious signal from somewhere else but now I sure that it does it all on it's own.
Anyone have any ideas of what could be done to correct it?
Do you know if I could disable it?

Thanks in advance

Ross