Electrical gremlin in my dually

[BTR69]

Good evening. I have a 1998 Chevy 3500HD quad cab. Been having issues for a while with the power door locks randomly locking or unlocking on their own. Sometimes a dozen or more times in a minute or so timeframe. Might not do it for hours, then might start and continue for hours. I've replaced the driver side switch and still happens. Checked the wiring in the doors and it appears fine. Unfortunately the fuse panel access doesn't have any labeling for what fuse is what, so I haven't messed around in there yet I haven't spent much time yet troubleshooting, will be doing that tomorrow I hope. Anyone have advice on what to look for besides a shorted wire or faulty switch? Thanks.