Electric fan relay wiring
Thread Starter
Instructor
Joined: Jan 2005
Posts: 202
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From: Enola PA
Electric fan relay wiring
I am wiring up my Proform Electric fan and Derale adjustable electric fan controller and need some advice. I want to use a manual override switch inside to turn the fan on an off but with my limited electrical experience can't seem to figure this out...
I have the positive wire from the fan going to the Alt lug for power, the larger red wire from the controller with a 30 amp fuse is connected to the negative wire on the fan.
I have the controller grounded to the frame and the small yellow wire to an IGN on the fuse pannel.
The small green (Override) wire for a manual switch is wired to a toggle under the dash on one post and a neg ground on the other.
Should this not work?
Any suggestions, clearly I am doing something wrong.
I have not checked to see if the fan turns on at engine temp as this is a new rebuild and I want cooling prior to running it any lenght of time.
I have the positive wire from the fan going to the Alt lug for power, the larger red wire from the controller with a 30 amp fuse is connected to the negative wire on the fan.
I have the controller grounded to the frame and the small yellow wire to an IGN on the fuse pannel.
The small green (Override) wire for a manual switch is wired to a toggle under the dash on one post and a neg ground on the other.
Should this not work?
Any suggestions, clearly I am doing something wrong.
I have not checked to see if the fan turns on at engine temp as this is a new rebuild and I want cooling prior to running it any lenght of time.
Instructor
Joined: Jun 2005
Posts: 156
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From: Liverpool NY
The fan controller is adjustable and you can have it turn on whenever you want. It may take a little messing around to get it set exactly where you want it, but once it's set you don't have to worry about it.
I considered an override myself but it seemed like just one more thing to go wrong....
I considered an override myself but it seemed like just one more thing to go wrong....
Thread Starter
Instructor
Joined: Jan 2005
Posts: 202
Likes: 2
From: Enola PA
My goal is to be able to turn the fan on with a toggle, prior to the sending unit turning the fan on...
I don't have AC in the car, so there is no hot wire that I am aware of...
Do I need a hot wire on the toggle or is the green override wire hot?
Electrical is not my strong suit... UGH!
I don't have AC in the car, so there is no hot wire that I am aware of...
Do I need a hot wire on the toggle or is the green override wire hot?
Electrical is not my strong suit... UGH!
Team Owner
Joined: Mar 2002
Posts: 24,160
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You need to supply 12v on that line to turn the fans on.
I would hook it to the same IGN power that you used for the yellow wire unless you want to be able to turn them on without the car running.
http://inet.derale.com/clientdocs/1_73_144_16759.pdf
Thread Starter
Instructor
Joined: Jan 2005
Posts: 202
Likes: 2
From: Enola PA
Perfect, yes, those are the instructions that came with the relay, I just was not sure if the Green override wire was a netural or a hot lead... that must be my problem, I have two netural leads hooked to the switch and nothing is happening when the key is on... I will change out the other lead to the Ign fuse and see if this works...
