1. Bad Ground: Check the connection between the antenna mast and the antenna motor housing to make sure it's clean, tight, and free of corrosion.
2. Faulty Wiring: Inspect the wiring going to the antenna motor for any damage or loose connections.
3. Defective Antenna Motor: If the wiring and connections look fine, the antenna motor itself could be faulty and may be in need of replacement.
4. Antenna Mast Issue: The antenna mast itself could be bent, damaged, or stuck, preventing it from moving up and down properly.
5. Control Circuit Malfunction: The electronic control circuit that operates the antenna may have a fault, such as a faulty switch or control module.
6. Radio Issues: In some cases, the problem could be related to the radio unit or the antenna input connection, which may be defective or have poor contact.
To accurately diagnose the problem, it is recommended to take the vehicle to a qualified repair technician who can inspect and test the antenna system to determine the specific cause and make the necessary repairs or replacements.
