I called Place Diverter and they would not tell me what diode said it was special and said Radio Shack or any other elec. store would not have it. They sold me the diodes ( no marking on them) and instrucions. I think I paid 25.00 for it. Make sure when your wiring the switch up to run the power and ground all the way to the battery or it will make your stereo pop evey time you hit the button. If you still need the wiring diagram I can get it later today.