hey all Got the 1999 Yukon acting up again....... Power door locks. At some point they have all worked... more and more I’m getting doors that will lock but not unlock, or unlock but won’t lock.... or that will sort of try to move either direction but never make it... This is using the original remote, aftermarket remotes and the lock button on the drivers door There doesn’t seem to be a pattern to it. I can’t imagine that I have 4 failing actuators.... but I suppose it’s possible. I thought maybe a fuse, but in that case there would be nothing at all... How about the relay? Is it either good or bad.... can it cause this kind of issue?