MCC Pigtail - molex                EFJ Third Party Interface
                                              Viking 2004 VX Universal Station

YELLOW - PIN 4                    "TXAUD"    Transmit Audio - J2 PIN 5
BROWN - PIN 2                      "PTT"      Transmitter Key - J2 PIN 7
BLACK - PIN 9                       "GND"      Logic Ground (chassis) - J2 PIN 21
ORANGE - PIN 3                    "LOGSQ"    Carrier Activated Switch - J2 PIN 4
GREY PIN 5                           "WBDIS"    Receiver Detector Output - J2 PIN 2