Quote Originally Posted by Ed_p View Post
and if the ribbon cable needs to be connected, how does the truck have anything to run off of?

I'm missing something or overthinking it.
My understanding is you have a APU1. Does your laptop detect APU1 hardware down at the bottom of TunerPro RT? You need to establish this connection by messing with the COM port on your laptop and preferences in TPRT. With the ribbon connected to G1 and G1 inserted into PCM, you should be able to load any bin into the emulator and the engine will be running off of the bin you just loaded to emulator.