cooling fan wiring

Douglas Walker

Registered User
I want to get away from my manual switches and let the EEC start controlling the cooling fans.

I have swapped the SC motor into a Mustang and removed the IRCM.

So if anyone has some information or diagrams on how to wire it so the Low and High speed fan will run on external relays with the SC EEC would be appreciated.

Thanks
Doug
 
From my memory the EEC is supplying ground.

Pin 13LG/P is low speed and has diode across the coil and a voltage inverter between the coil and PCM input.

Pin 31T/O is high speed and just goes to the coil.

Power to coils and fan is control by another relay that is connect to 30A start/run hot fuse. Power goes to coil and common.


Should get you close.
 
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