Ramcharger fans to ECM/conversion harness

[SStavin]

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:

 

[fleming442]

You should just be able to wire the yellow and green from the switch to the ECM harness. The switch is triggering the relays with a ground- same as an ECM.

 

[SStavin]

You should just be able to wire the yellow and green from the switch to the ECM harness. The switch is triggering the relays with a ground- same as an ECM.

Like this? will the switch still operate as an override?

 

[fleming442]

Good idea! Should work wonderbar.

 

[SStavin]

Good idea! Should work wonderbar.

Full credit to you sir! Thanks for the help!

 

[81cutlass]

Are Ramcharger fans the HD or standard fans? I had the intrepid fans (same thing) but had the HD cooling with relays on the top of the fan and the wiring was different.

 

[SStavin]

Are Ramcharger fans the HD or standard fans? I had the intrepid fans (same thing) but had the HD cooling with relays on the top of the fan and the wiring was different.

Just the standard intrepid fans with a plug n' play harness sold through a vendor. I don't think they are around anymore