I have Ramcharger dual fans with the original wiring harness which is setup with a manual low-off-high switch. Fans run together in low and high. I would like to run the fans to be controlled through the ECM. The psi conversion harness am running has the provisions for fan 1 and fan 2. Can anyone chime in and provide some insight to properly modify the harness so the ECM can support the fans?
I put together a diagram of the original harness routing:
I put together a diagram of the original harness routing: