electro-mechanical cooling fan idea

[Broncobowsher]

A friend just swapped out the fan clutch on his 5.9 cummins Dodge. It is one of those fancy eletronicly controlled fan clutches and not just the bi-metalic spring on the front. Since I am always the tinkerer he gave it to me to think about how it might work.

I got it home, looked it over, pulled the spare new 5.0 Explorer waterpump I have on the shelf. Well what do you know, it threads on there. This fan clutch is toast so it won't be used. But for mock-up purposes it might be good. It is a HUGE clutch. I don't have a fan for it. I have no idea what the 5 wires do either. I don't have any wiring details for it.

But it does give me some ideas for a clutched cooling fan

 

[broncnaz]

Some of the wires are temp sender then speed control I guess it can vary fan speed according to temp. From what I understand the dodge PCM may not power up when the fan clutch is bad. Basically the PCM controls the fan speed based upon various inputs. It would be interesting but at $200+ a pop it might not be to bronco friendly.