This is why I said exact product number matters. I did a search for "GP7 Reading" and this is what came up 6-84110
https://www.lionelsupport.com/...Plus-GP7-619-6-84110
That is NOT a bluetooth enabled board, that is the earlier version that is RF remote pre-bluetooth.
It's pinouts will not match the diagrams I posted
This motor has a tachometer encoder flywheel and matching sensor
And the problem is, that engine needs and has a Tachometer on the motor. The only way I know to get those parts is order the whole $32 motor which oddly they are now leaving out of the parts lists?????
https://www.lionelsupport.com/...hartsrecordcounter=1
If I didn't know better, between them removing all listings of the LCP2 boards, and then this leaving a critical motor link off of parts breakdowns, I'd think they didn't want us knowing this how to transplant Lionchief parts into another loco.......