1. Mechanical Damage: Despite appearing to function, there may be internal mechanical damage to the actuator, preventing it from properly engaging the 4X4 system. Issues like worn gears, damaged splines, or a broken actuator shaft could lead to this problem.
2. Electrical Issues: Faults in the electrical components or wiring associated with the actuator could also cause the symptoms you describe. This includes problems with the actuator solenoid, electrical connections, or control module (if applicable).
3. Incorrect Installation: If the actuator was recently replaced, it's possible that it wasn't installed correctly, resulting in a failure to engage 4X4 properly.
To accurately diagnose the issue, you'll need to perform further tests and inspections on both the actuator itself and the 4X4 system as a whole. It may be necessary to consult a professional mechanic or automotive technician who has experience with 4X4 systems to identify and resolve the exact cause of the problem.
