3 JButtons not working to trigger 3 drawImages

I am trying to make a project with a border layout, 3 jbuttons, and the drawImage component of paint to create a stoplight that listens for button pushes and changes the images. I know my drawImages in the conditional statements work because if I take the if statement out the images appear fine, and I know the action listeners work because I tested each one with a joptionpane dialog box. However, in the current form, nothing happens at button push and I'm not sure why. Any help would be much appreciated, I am learning!

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class TrafficLight extends JFrame implements ActionListener
{
//establishes panel, button, and boolean variables
 private JPanel pN, pS, pE, pW, pC;

 private JButton btnWait, btnGo, btnStop;

 private boolean redIlluminated = false , greenIlluminated = false , yellowIlluminated = false;

public static void main(String[] args)
{
    TrafficLight frame = new TrafficLight();
    frame.setSize(750, 850);
    frame.createGUI();
    frame.setVisible(true);

}

private void createGUI()
{
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    Container window = getContentPane();

    window.setLayout(new BorderLayout());

    //custom colors
    Color slate=new Color(49, 58, 58);
    Color eggshell=new Color(230, 226, 222);
    Color easterPink=new Color(249, 170, 170);
    Color salmon=new Color(201, 80, 65);
    Color dusk=new Color(187, 185, 184);
    Color billiards=new Color(71, 88, 68);

    //custom fonts
    Font buttonFont = new Font("SansSerif", Font.BOLD, 20);

    //sets up north jpanel 
    pN = new JPanel();
    pN.setPreferredSize(new Dimension(680,45));
    pN.setBackground(eggshell);
    window.add (pN, BorderLayout.NORTH);

    //button formatting
    //establishes go button, font, color, and click event, then adds it to pN panel
    btnGo = new JButton ("GO");
    btnGo.setFont(buttonFont);
    btnGo.setBackground(dusk);
     btnGo.addActionListener(
        new ActionListener()
        {
            public void actionPerformed(ActionEvent ae)
            {
                //trigger condition change here to cause the paint event below
              greenIlluminated = true;
            }
        }
    );
    pN.add(btnGo);

    //establishes wait button, font, color, and click event, then adds it to pN panel
    btnWait = new JButton("WAIT"); 
    btnWait.setFont(buttonFont);
    btnWait.setBackground(dusk);
    btnWait.addActionListener(
        new ActionListener()
        {
            public void actionPerformed(ActionEvent ae)
            {
               //trigger condition change here to cause the paint event below 
              yellowIlluminated = true;
            }
        }
    );
    pN.add(btnWait);

    //establishes stop button, font, color, and click event, then adds it to pN panel
    btnStop = new JButton("STOP");
    btnStop.setFont(buttonFont);
    btnStop.setBackground(dusk);
    btnStop.addActionListener(
        new ActionListener()
        {
            public void actionPerformed(ActionEvent ae)
            {
                //trigger condition change here to cause the paint event below
              redIlluminated = true;
            }
        }
    );
    pN.add(btnStop);

    //east jpanel for stoplight
    pE = new JPanel();
    pE.setPreferredSize(new Dimension(272,318));
    pE.setBackground(billiards);
    window.add (pE, BorderLayout.EAST);

    //west jpanel
    pW = new JPanel();
    pW.setPreferredSize(new Dimension(136,318));
    pW.setBackground(billiards);
    window.add (pW, BorderLayout.WEST);

    //center jpanel for car
    pC = new JPanel();
    pC.setPreferredSize(new Dimension(272,318));
    pC.setBackground(slate);
    window.add (pC, BorderLayout.CENTER);

    //south jpanel
    pS = new JPanel();
    pS.setPreferredSize(new Dimension(680, 15));
    pS.setBackground(eggshell);
    window.add (pS, BorderLayout.SOUTH);
}

public void actionPerformed(ActionEvent click) {


    }

public void paint(Graphics g) {
    super.paint(g);
    //draws stoplight
    g.drawImage(new ImageIcon(getClass().getResource("red1.png")).getImage(), 460, 150, this);
    g.drawImage(new ImageIcon(getClass().getResource("green1.png")).getImage(), 460, 272, this);
    g.drawImage(new ImageIcon(getClass().getResource("yellow1.png")).getImage(), 460, 373, this);

    //draws car in center
    g.drawImage(new ImageIcon(getClass().getResource("car.png")).getImage(), 150, 600, this);

    //sets conditions to show images on button click based on boolean logic changed by buttons
    if (redIlluminated)
    {
        g.drawImage(new ImageIcon(getClass().getResource("red2.png")).getImage(), 460, 150, this);
    }

    else if (greenIlluminated)
    {
        g.drawImage(new ImageIcon(getClass().getResource("green2.png")).getImage(), 460, 272, this);
    }
    else if (yellowIlluminated)
    {
        g.drawImage(new ImageIcon(getClass().getResource("yellow2.png")).getImage(), 460, 373, this);
    }
     }

}