Getting Missing Component Error when in play mode

Hi, I'm Luke, and I'm working on a script for Car lights for my new driving game I'm making, but When I press the play button, I keep getting the same error saying Missing component exception on The headlights, brake lights, even the reverse lights, I tried using Null method but that didn't work. I even tried using the GetComponent Method and that still gave me errors, what Do I do?

here's my code.

 void Start () {
     light = base.gameObject.GetComponent<Light>();
         animation = base.gameObject.GetComponent<Animation>();
         if (animation.gameObject.GetComponent<Animation>() != null){
         Debug.Log("Can't find animation");
 }
 }
         
     // Update is called once per frame
     void Update () {
     if (isOn)
         {
         light.enabled = true;
     }
         else
         {
         light.enabled = false;
 }
 if (isOn == true && lightType == LightTypes.Indicator)
 {
         animation.gameObject.GetComponent<Animation>().Play();
     }
         else
         {
          animation.gameObject.GetComponent<Animation>().Stop();
         }
     }
 }