Unity - Touch Input help needed

I'm just starting to learn Unity and I must admit at the moment im struggling linking my code scripts together. Im used to having a main class to work from.

I have been trying to implement virtual touch joysticks. I have the following code and it does control the player, but it is just moving a rigidbody.

What I want is to make this virtual joystick give out a relevant X,Y vector2 so that I can access it in another class, specifically for this case I am trying to use it with the prefab Car from the Standard Assets pack. All I am trying to do for now is if up is held, accelerate the car.

The car prefab code is not altered so far. And therefore it works if I use keyboard, but if I build for Android the touch joysticks respond to touch but I cant get the car to move.

Here is the joystick code im using:

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(Rigidbody))]

public class PlayerMoveController : MonoBehaviour {

// PUBLIC
public SimpleTouchController leftController;
public SimpleTouchController rightController;
public float speedMovements = 5f;
public float speedContinuousLook = 100f;
public float speedProgressiveLook = 3000f;
public bool continuousRightController = true;

// PRIVATE
private Rigidbody _rigidbody;
private Vector3 localEulRot;
private Vector2 prevRightTouchPos;

void Awake()
{
    _rigidbody = GetComponent<Rigidbody>();
    rightController.TouchEvent += RightController_TouchEvent;
    rightController.TouchStateEvent += RightController_TouchStateEvent;
}

public bool ContinuousRightController
{
    set{continuousRightController = value;}
}

void RightController_TouchStateEvent (bool touchPresent)
{
    if(!continuousRightController)
    {
        prevRightTouchPos = Vector2.zero;
    }
}

void RightController_TouchEvent (Vector2 value)
{
    if(!continuousRightController)
    {
        Vector2 deltaValues = value - prevRightTouchPos;
        prevRightTouchPos = value;

        transform.localEulerAngles = new Vector3(transform.localEulerAngles.x - deltaValues.y * Time.deltaTime * speedProgressiveLook,
            transform.localEulerAngles.y + deltaValues.x * Time.deltaTime * speedProgressiveLook,
            0f);
    }
}

void Update()
{
    // move
    _rigidbody.MovePosition(transform.position + (transform.forward * leftController.GetTouchPosition.y * Time.deltaTime * speedMovements) +
        (transform.right * leftController.GetTouchPosition.x * Time.deltaTime * speedMovements) );

    if(continuousRightController)
    {
        transform.localEulerAngles = new Vector3(transform.localEulerAngles.x - rightController.GetTouchPosition.y * Time.deltaTime * speedContinuousLook,
            transform.localEulerAngles.y + rightController.GetTouchPosition.x * Time.deltaTime * speedContinuousLook,
            0f);
    }
}

void OnDestroy()
{
    rightController.TouchEvent -= RightController_TouchEvent;
    rightController.TouchStateEvent -= RightController_TouchStateEvent;
}

}

Again, the question is how do I get a public variable Vector2 of the X and Y movement of the joystick, instead of directly moving the rigid body from inside this code.

Thanks for any help.

EDIT: The rigidbody is just in a primitive sphere for my testing purpose, it has nothing to do with the car prefab. I want to change the sphere for a car prefab and using the XY Vector I was talking about above alter the car controller code to take those values and accelerate, brake etc.