My S13 SR20DET Prep
Thread Starter
Contributing Member
Joined: Sep 2002
Posts: 1,192
From: Starkville, MS.
Fan Controller Fixed!!!
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 CABIN
WHITE-NEGATIVE GOING TO THE COOLANT TEMP SENSOR
BLACK-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!!!!
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 CABIN
WHITE-NEGATIVE GOING TO THE COOLANT TEMP SENSOR
BLACK-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!!!!
Thread Starter
Contributing Member
Joined: Sep 2002
Posts: 1,192
From: Starkville, MS.
Nothing new as of late. It's either been too cold or raining so I haven't done anything other than maintenance on my car because of it. I still have leftover projects to complete like the brakes and suspension upgrades but as far as the engine goes I'm thinking about getting a VLSD, a lighter driveshaft and maybe going frontmount.
Registered User
Joined: Dec 2008
Posts: 182
From: missouri
Yeah as you've seen mr. spaghetti my build is going the same way just taking my time checking everything out .Great build though and your helped me figure out which reducer i need for my coolant censor lol . If your like me you want it in and running but you force yourself to do it right .
Registered User
Joined: Jun 2009
Posts: 2
From: ORLANDO, FL
Gooorrrrgeous, rookie!!
I have to commend you for diving head first, into a build that would scare a lot of people into paying a bad shop little money to do shotty work.
You are a craftsman, with great attention to detail.
This is a beautiful build, and I love that you did it in what looks like your
kitchen. Hilarious. But the end product is amazing sir. Love the car.
Love the parts, love your car. Cant wait till mine is done and running!
You are a craftsman, with great attention to detail.
This is a beautiful build, and I love that you did it in what looks like your
kitchen. Hilarious. But the end product is amazing sir. Love the car.
Love the parts, love your car. Cant wait till mine is done and running!
