Update

Assets/Third Parties/Opsive/UltimateCharacterController/Demo/Scripts/Car/BrakeLight.cs

@@ -0,0 +1,23 @@
+
+namespace Opsive.UltimateCharacterController.Demo.UnityStandardAssets.Vehicles.Car
+{
+    using UnityEngine;
+
+    public class BrakeLight : MonoBehaviour
+    {
+        private CarController m_Car;
+        private Renderer m_Renderer;
+
+        private void Start()
+        {
+            m_Car = GetComponentInParent<CarController>();
+            m_Renderer = GetComponent<Renderer>();
+        }
+
+        private void Update()
+        {
+            // enable the Renderer when the car is braking, disable it otherwise.
+            m_Renderer.enabled = m_Car.BrakeInput > 0f;
+        }
+    }
+}