positron1 wrote:Well, after many attempts I got the DiF fan controller to control the fans the way it was meant to, thus stopping me from using the manual control switch to run both fans all the time and burning up the fan motors. Let me tell you what Nissan did with the wire colors on this setup. When I first fixed the grounds and got the fans to respond to the manual switch I was happy but I really wanted this fan controller to do what it was promised to do so over the past four or five weeks I've been trying to figure out what the problem was. I pulled the fan wiring six or seven times examining the connections and redoing the wiring and got no results, the fans never worked without the manual switch. Well it turns out the colors of the wiring on the coolant temp harness that I have are different from the colors on the one shown on FRSports install.This is how the wires are on the SR20DET harness on FRSports DiF fan install. They clearly show the three wires to be blue w/ orange, blue w/ black, and black. The harnesses must be from different year models or something because the colors on my coolant temp harness are as follows...Red, white and black. I naturally assumed that the red would be positive, the black negative and the white being the wire that goes to the temp gauge sender for the console....BOY WAS I WRONG!!!! I was at my wits end trying to figure this out so the other night as I was looking at some old pics of my harness I decided to pull the fan harness and remove some covering on the coolant temp plug and see which of these three wires went to it and it turned out to be the white and black wires going to the coolant temp sensor while the red wire branched off to the coolant temp gauge sender. So I pulled the tap that I had on the red wire which I thought was positive and put that on the white wire which seemed to be positive...nothing. I was at a loss, the next step to fix this problem was to buy a multimeter, something which I should have done a long time ago but I got a tip from a forum member on 240SXforums(beyondstock is his name) that the wires were reversed and it turned out to be true. FOR ANYONE THAT HAS THIS PROBLEM AND THE SAME COLOR HARNESS AS ME THE WIRES ARE AS FOLLOWS...RED-TO GAUGE SENSOR UNIT GOING TO THE CONSOLE IN THE CABINWHITE-NEGATIVE GOING TO THE COOLANT TEMP SENSORBLACK-POSITIVE GOING TO THE COOLANT TEMP SENSOR.
It's cold today but I just went outside, set both fans to 150 degrees, started the car, let it get warmed up and both fans came on under control of the DiF fan controller and when I turned the car off both fans ran for a short time like the instructions say...so problem, "long sigh" solved!!!!
i am going to go check mine to see if its the same. cause mine kick on right away and then run fora little bit after it turns off