[PDF] Installation Instructions – JMS EGT Kit 9617A & 9617B coded pin-out diagram for the cable. You can tone out the pins on the connector if needed via the attached wiring diagram. If display on your X3 device is not reading a EGT value, unplug and reinsert FireWIRE cable. If the EGT FireWIRE cable is not plugged SCT Livewire - Diesel Database Oct 23, 2010There are three ports on the Livewire – one for the USB cable to load tunes, update firmware, etc., another is a firewire connector for analog input and the third is the one that goes to your OBD-II port. The LiveWire comes with three tunes from SCT for towing, performance and fuel economy, that they’ve dyno tested.