5.7L hemi Duster/resto.

sag this is from the 06 service manual but i believe you will find the same since I think you said you were using the 05 pcm. If you were to look at the wiring diagram 8w30-2 you will see the circuit you are talking about at the bottom. You will also see two small ## signs next to 12 c1. This indicates it is only used for the 42rle transmission. I do believe you will be ok with not using it at all.