I recently acquired a stock efan unit from a 2010 F150 and have been reading up on installing it on my 07 F150. All the threads I have read people use the aftermarket wiring kits with an inline temp sensor in the radiator hose. Does anyone know if it would be possible to control them from the stock wiring that goes to the stock electro magnetic fan clutch? The stock fan has 4 or 5 wires going to it I am trying to find a wiring diagram to see what they all do.

 

Pin numbers and wire colors for the fan plug on 2008 F150.

Pin 1 (RD-OG) - Electronic fan clutch speed signal
Pin 2 (GY-YE) - Reference voltage
Pin 3 (RD-YE) - PCM power relay output
Pin 4------------- Not Used
Pin 5 (BK) - Ground
Pin 6 (DB) - Electronic fan clutch control
Pin 7 ------------ Not used
Pin 8 ------------ Not used

 

Following this with interest. If it works please share.

 

Doesn't look like there is a simple on/off signal from the pcm. Looks like the pcm is looking for feedback from the fan and adjusting accordingly. You don't happen to have a wiring diagram for it do you? I have been looking more into the aftermarket wiring kits. Most of them are either 195on/185off or 185on/175off. Having the stock 195 thermostat if I mounted the temp sensor in the upper hose where most people do I figure it would run all the time. From what I have been reading I need a 205 or 210 on and 195off since the 195 temp of the thermostat is when it begins to only slightly open and fully open around 205. I was thinking of mounting the 195on/185off in the lower hose that way if I am cruising the vehicle speed will be flowing through the radiator and the fan won't turn on but if I am stop and go driving it would see the radiator heating up then turn on. Any thoughts on this idea?

 

I only have a paper manual so the best I can do is a picture of the diagram.

 

Man o man, I was just thinking about this sort of idea. Would LOVE to know where OP ended up.@power stroke Aaron what happened?
I am hoping for a 12v based off pcm temperature to trigger a relay with. Maybe some way to reattach the clutch sensor to the water pump… just minus the fan. Maybe that’d be enough to trick the pcm?