Because the antenna system is equipped with a capacitor, the continuity cannot be checked. Therefore proceed the following simple inspection.
Turn the AM radio on.
Tune to the frequency that there is no broadcast and you will hear a buzzing sound.
Use a work light and move it around the glass antenna (approx. 10—20 mm {0.40—0.78 in})
NOTE:
If a whirring sound from the speaker synchronized to the work light movement is confirmed, the antenna system is normal.