Car MultiTouch Controls

Hi guys, i have found a problem with my code recently, i'm developing a racing game and i need help with the following situation:

i have 4 scripts to control the car (foward, back, left, right) each one is attached to a different GuiTexture.

Everything works like a charm except for one thing, i can only turn my car if i'm already touch the screen wich makes impossible to turn without accelerate or brake, i really need help

i want the car to be able to turn without accelerating or braking

here's the 4 codes

forward.js function Update() {

     if(Input.touchCount > 0)
     {
         var touch: Touch = Input.GetTouch(0); 
         if((touch.phase == TouchPhase.Began && guiTexture.HitTest(touch.position)
         ))     
         {
          TouchControls.vertical = 1.0;
          }
          else if (touch.phase == TouchPhase.Ended)
          {
              TouchControls.vertical = 0.0;
          }
 }
 }

back.js

 function Update() {
 
     if(Input.touchCount > 0)
     {
         var touch: Touch = Input.GetTouch(0);
         if(touch.phase == TouchPhase.Began && guiTexture.HitTest(touch.position))
         {
            TouchControls.vertical = -1.0;
          }
          else if (touch.phase == TouchPhase.Ended && guiTexture.HitTest(touch.position))
          {
              TouchControls.vertical = 0.0;
          }
 
 }
 }

left.js

 function Update() {
     if(Input.touchCount > 0)
     {
          var touch: Touch;
         touch = Input.GetTouch(1);
         if(touch.phase == TouchPhase.Began && guiTexture.HitTest(touch.position))
         {
            TouchControls.horizontal = -1.0;
          }
          else if (touch.phase == TouchPhase.Ended)
          {
              TouchControls.horizontal = 0.0;
          }
 }
 }

right.js

 function Update() {
     if(Input.touchCount > 0)
     {
     var touch: Touch;
         touch = Input.GetTouch(1);
         if(touch.phase == TouchPhase.Began && guiTexture.HitTest(touch.position))
         {
            TouchControls.horizontal = 1.0;
          }
          else if (touch.phase == TouchPhase.Ended)
          {
              TouchControls.horizontal = 0.0;
          }
 
 }
 }

any help will be really appreciated :)