Ricks Ram
Senior Member
- Joined
- May 1, 2015
- Posts
- 4,411
- Reaction score
- 3,417
- Ram Year
- 2014
- Engine
- Hemi 5.7
The check engine light is common when doing the full conversion because we are changing the heater control module. I usually goes away after a few on off cycles. I have also seen a few bad conversion harnesses. I havent seen this happen with the O.E.M. auto T harness but as Mpgrimm2 stated it could be defective. That would be your most likely scenario for a check engine light. If the light stays on after you have tried disconnecting the battery and bypassing the harness. I would pull the codes and see exactly what you are dealing with.