Wiring an Electric Cooling Fan - Holley EFI

[meanstreetoutlaw]

Meziere remote water pumps, hooked to an MSD relay. Probably have the Holley turn on the pumps with engine RPM and use the overhead switch panel to manually override the ECU when needed.

[Dlsmith]

Enabling Fans in Basic I/O. When I connect my laptop (Online) and go into Basic I/O to check mark the box next to Fan, the options to enable the fans are grayed out. If I use USB Link I can check the boxes, but can't (don't know how to save the changes). How do I get around this so I can enable my fans? I have a Sniper Stealth with Spal dual 11" fans with their two relays. The fans will work if I use the radiator sensor, but I want to control the fans with the Sniper. Please help as I do not want to change my tune.

[andrewb70]

You have to enable the fans in the Basic I/O with the ECU NOT online with the ECU. Then you save the changes and use the Sync button to send the revised tune back to the ECU. Andrew