How to use a switch case function to reference options that is used numerous times in the previous drop-down?

I am using Java Coding in LiveCycle and developing dependent drop-down boxes but I am having difficulty writing the correct code. See example below. I am trying to use a multiple case function that references an option that is listed numerous times in the previous drop-down. The problem that I am running into is that when I reference Chevy or Nissan and any color, it is returning the results of the color under the "Ford" column only. I will still see the color options (Blue, Black, Green and Purple) in my second drop down and it looks fine, but then the third drop-down only references "Ford" colors and options. (I did not list the code for the third drop-down).

I want the customer to choose Chevy or Nissan and then have its dependent drop downs (based on the color they chose), but I cannot seem to make this work.

I hope this is clear enough (probably as mud…). I would greatly appreciate any help!!

form1.#subform[0].#subform[1].cboModels::exit - (JavaScript, client) 
cboColor.clearItems(); 
switch(this.rawValue){ 
case "Ford": 
  cboColor.addItem("Blue"); 
  cboColor.addItem("Black"); 
  cboColor.addItem("Green"); 
  cboColor.addItem("Purple"); 
  break; 

case "Chevy": 
  cboColor.addItem("Blue"); 
  cboColor.addItem("Black"); 
  cboColor.addItem("Green"); 
  cboColor.addItem("Purple"); 
  break; 

case "Nissan": 
  cboColor.addItem("Blue"); 
  cboColor.addItem("Black"); 
  cboColor.addItem("Green"); 
  cboColor.addItem("Purple"); 
  break; 
} 


form1.#subform[0].#subform[1].cboColor::exit - (JavaScript, client)
cboPrice.clearItems(); 
switch(this.rawValue){ 
  case "Ford": 
  case "Green": 
  cboPrice.addItem("blah"); 
  cboPrice.addItem("blah"); 
  cboPrice.addItem("blah"); 
  cboPrice.addItem("blah"); 
  break; 

  case "Chevy": 
  case "Green": 
  cboPrice.addItem("blah"); 
  cboPrice.addItem("blah"); 
  cboPrice.addItem("blah"); 
  cboPrice.addItem("blah"); 
  break; 

  case "Nissan": 
  case "Green": 
  cboPrice.addItem("blah"); 
  cboPrice.addItem("blah"); 
  cboPrice.addItem("blah"); 
  cboPrice.addItem("blah"); 
  break; 
}