I have seen online the XSB fan control for sale for $90. Thats really steep for a few feet for wire and a $5 relay. Has anyone used a relay and wired it in in parallel to the OEM fan relay so that even if the switch is off the OEM relay kicks the fan on?

I know I can make this, but what relay should I use? As many people know, Traffic in Hawaii is 2nd worst nationally. the constant stop and go makes my temp sky rocket to 230'F for long periods of time. I need to stop that. any help would be appreciated very much.

 

just add a new power source and ground to the fan motor and wire a toggle switch inline with that. Check out the lower temp fan switch thread in the how to section if you havent already...that might be of some help too.

 

Dont wire a toggle switch inline unless it can handle the current draw by the fan.

Your best bet is to use a tiny little switch, and a relay. Heres a nice doodle i did. With this it will work such that when your switch is on, your fan will be on constantly. When your switch is off, it will work as normal.(only turning on when it gets hot).
Sorry in advance for the handwriting, i didnt want to spend the time to computer draw it because im laaaazzzzyyy! 2 12 volt wires come direct from the battery. Small wires can be 18-22 gauge.

 

what does pin 87 got to?

 

ok let me see. the sensor on the raidiator is a single line out. i believe it turns into a negitive once heated up right? that would complete the curcuit and cause the fan to engauge. ok . So i'd remove the wire to that sensor. where would i run the sensor and the wire removed from the sensor to on the relay? i know the relay needs power and ground. I maybe over thinking this...

 

So this is what I came up with in my head...

Pin 30 - connected to wire from harness ( the one that was connected to the sensor )
Pin 87a - connected to the sensor
Pin 87 and Pin 86 - grounded
Pin 85 to switch
Switch to +12v Ignition.


Does that sound right???

 

Dont worry about the sensor. Just take the 12 V wire going to the fan. Cut it then the side going to the fan goes to pin 30, the side coming from the bike, goes into 87A. Your heat sensor controls a circuit like this, the fan is not directly powered from the sensor, sensor controls relay, then relay controls fan.

pin 87 goes direct to the battery
85 goes to switch, which goes to 12V ignition power.(you want it to shut off when you turn off your bike.)


I suck at explaining things...lol

 

Alright!!! ok guys I got it up and running. I will have detailed instructions and pics on it tomorrow. Ittl be a nice install thanks for the help

 

Alright didn't put it in yet but here is my instructions, and they really work! lol

 

Somethin like that except 87 needs to go to 12v + direct from your battery. In the configuration you got there you are powering your fan with ground when your switch is active. It looks like your switch is a dorman switch, should just need to hook up power and output to relay.

Just Wanted to clearify some things here: