I have a 93 Seville STS that I am replacing the head unit in and need to test one my friend has for sale before buying it. It is the BOSE GOLD, I have the plug from the car and I noticed they change colors as they go to the radio side? Does anyone know which ones are hot and ground so I can at least turn it on? Thanks A Bunch in advance!

cant test it without the actual brain of the unit which is in the trunk...