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Now that the cooler temps are here, I notice that when idling without A/C, my cooling fan does not cycle as it should. I would like to hardwire the fan to be on whenever the car is cranked but am having trouble locating a suitable power source. Can anybody suggest where to plug the positive side so that it only gets power when cranked? Sounds so simple yet I went through the fuse box yesterday and could not find a suitable lead.
 

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Is the car running hot now? If not then the fan is coming on as it should. Aluminum is a great conductor of heat and when the temps drop the fan doesn´t need to run much at all. If however you find the car running hota and want the fan to run when the car is on then this is how I have done it before. locate the the wires going to the ignition switch find the one that is powered when the car is on. I may be able to give you a color on that tomorrow. tap into it with another piece of wire. go get a solenoid some connectors and wire from the parts store. use the wire you attached to the ignition to activate the solinoid. run a line from some constant power fuseblock battery whatever. this will be what you hook to the solinoid to power the fan. hook up som grounds put in some fusible links and bingo you good to go.
 

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Get yourself another relay from a junked car, force the cover off and tape it together using a good electrical tape. then put the cover on it. It will turn on everytime you start the car. If you ever want to go back to stock, replace it with th old one.
 

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I would like to do this unless my relay or the sensor went bad. EGTs suffer from even more vibrations through the steering column and the driver seat when the fan is on.
 

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I wouldn´t like to do this unless my relay or the sensor went bad. EGTs suffer from even more vibrations through the steering column and the driver seat when the fan is on.
 
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