Quote Originally Posted by EllisDee37 View Post
I haven't tested it, but it feels to me that spot has a longer range than search. So maybe take another step or two after the spot warning.

Most of the time, though, it's that the control box is on the other side of the trap.
It seems like you're getting the hang of it, but I thought I'd reiterate both of these points in the quoted post. Some traps definitely give you the spot warning while you're outside of search range.

As an additional tip, keep your eye on the trap spot/warning icon - if it's on the screen and then disappears after you search, it means that you've successfully found the box, even if you can't see it immediately.