Uploaded April 2026 | Updated September 2026, 2 hours ago
How I added a manual override to our engine fan on our 2012 Ram 6.7, This truck likes to run warm on us when temps are higher and climbing, also when stationary without good airflow. My fix is a manual full-fan engagement switch. I can now engage the fan before the engine starts getting warm and it has stayed cool ever since. NOTE: If you want to do this you are powering the ECU circuit directly so i cannot guarantee it also sets a check engine light, I fused it at .5A and its been working well for about 6 months without issue.
How I added a manual override to our engine fan on our 2012 Ram 6.7, This truck likes to run warm on us when temps are higher and climbing, also when stationary without good airflow. My fix is a manual full-fan engagement switch. I can now engage the fan before the engine starts getting warm and it has stayed cool ever since. NOTE: If you want to do this you are powering the ECU circuit directly so i cannot guarantee it also sets a check engine light, I fused it at .5A and its been working well for about 6 months without issue.
