I'm no wiring expert at all, so I'm looking for advice.....

[rakkasan]

for one reason or another, the provisions within the engine wiring harness for the hydrofan ECU was removed. I am a huge fan of the hydrofan, so I want to retain it (fully functional).

I have wired the solenoid in to a switched power source with a diode in line so it will partially open the solenoid. This is working for the time being, but I still want the ECU to control the fan so I wont have to worry about the car overheating.

With the preface above, I'm looking to create a separate hydrofan harness, attaching to all the correct sensors, so I can regain all the functionality of the hydrofan. Is there a TEWD that shows where the hydrofan ECU draws all of its signals from? If there is, it shouldn't be too hard to create a harness for, no?

Any help will be GREATLY appreciated

 

[JonoTurbo]

I'm not sure if this will work, but I have attempted to attach the hydrofan wiring diagram. There is a temperature sensor in the radiator you will need in addition the the computer and pump. The diagram also labels something as a distributor, which must be a bad translation so you will have to figure out what they actually mean.

View attachment 1JZFanComp.pdf

 

[WeDgE]

I have wired the solenoid in to a switched power source with a diode in line so it will partially open the solenoid. This is working for the time being, but I still want the ECU to control the fan so I wont have to worry about the car overheating.

I don't understand how a diode would block *some* voltage allowing the solenoid to partially open? Diodes either allow all or block all voltage/current, depending how they're oriented. Unless you meant resistor??

 

[rakkasan]

I don't understand how a diode would block *some* voltage allowing the solenoid to partially open? Diodes either allow all or block all voltage/current, depending how they're oriented. Unless you meant resistor??

I meant resistor, sorry about that