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Cooling fan problem

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    #31
    First step is to figure out if the fan is hotwired because of a problem in the original wiring/circuit or if it's because there is no wiring....

    Have a look around the front of the engine bay (passenger side) around where the air box was to see if you can spot any wire connections that are not connected. It should be around/below the coolant overflow reservoir.

    Report back if you can find the wiring connection.

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      #32
      I've looked around the engine bay im not seeing any wiring connections, the fan plug is still connected to the fan. Its wired from there to the battery. Thanks for helping.

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        #33
        Ok, I had a closer look at mine, and if you pull the overflow reservoir right out of the car you'll see a three-way split in the wiring harness right under the reservoir: 1 goes to your hi-beams, 1 goes to the horn, and a third should go to your fan plug. On mine it is two wires, a blue and a black to a male plug.

        Bear in mind that I have an f22, and I don't know how the previous owner wired your swap, but I would try and find that split in the harness I was talking about to see if there's a connection there.

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          #34
          Ok so I took a closer look, I found two split end wires hanging down there under the coolant tank. Now to run the trouble shooting stated above?? Thanks for all your help I appreciate it..

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            #35
            Right on!

            My next step would be to get the car running hot enough that you would have the fan running if it were attached properly (thermostat open, upper and lower hoses hot), and with the car running (temp tolerances for running the fan are lower w the ignition on) try touching the two loose wires to the ends of the contacts in the female plug for the fan. Try switching the ends if you can't get the fan to turn on (shouldn't make a difference, it's a DC motor, but you never know...)

            If the fan runs, awesome, just get a male connector for the loose wires or solder the wires direct to the fan wires (make sure the blades are turning in the right direction to cool the rad).

            If you try for a while to get the fan to turn on with a bunch of temp ranges, and it won't turn on, then it's time to look at more trouble shooting like:
            • Fuses
            • grounds
            • bad wiring
            • Fan relay
            • Temps sensors
            • Fan timer


            Try see if you can get it to run off the wires when hot first and let us know how it turns out.

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