Any idea where to start troubleshooting diff lock that won’t engage. 4wd works fine aka one whee won’t spin if it has no traction so kind of a 3wd. Diff lock acts the exact same as normal 4wd. I can hear the actuator when I press diff lock. The indicator blinks then goes solid X, but diff lock is most definetly not truly engaged. Should I just attempt warranty or is this a common issue with some easy fixes and items to check?