Radiator Bypass fan switch issue

FvnnyL3tt3r1ng · September 30th, 2012, 07:16 PM

I just installed a switch which lights up when it is on (or is supposed to) to my radiator fan and it does turn the fan on but everytime I try to connect the "Earth ground" side of the switch to either chassis or battery -Neg the fuse blows instantly!

I have tried multiple sites and the strange thing is I have the same model switch which works fine running for my LEDs right next to it. I have the switches terminals separated by heatshrink but right now I'm thinking the switch might be bad.

I did a continuity test before I installed it and the switch was fine but maybe I damaged the switch somewhere in the soldering process.

Motofool · October 1st, 2012, 05:57 AM

Justin,

One leg of the fan is directly connected to the negative pole of the battery.
The other leg goes to the radiator switch, then to the fuse #10, then to the positive pole of the battery (via starter solenoid).

http://faq.ninja250.org/images/a/a4/...matic_-_R4.pdf

Your light should be connected in prallel with the fan.
One leg goes in between the fan and switch and the other leg connects to the negative leg of the fan.

FvnnyL3tt3r1ng · October 1st, 2012, 07:35 AM

If I connected it in parallel with the fan it would just short after the thermostatic switch opened. I have it connected in parallel with the thermostatic switch right now so it bypasses the temperature trigger. I just don't get why when I connect the "earth ground" pole of the switch (which completes the LED in the switch) the fuse blows instantly, even when I use the same ground as the fan's circuit on the switch????

Motofool · October 1st, 2012, 11:12 AM

Do you have something like this?

FvnnyL3tt3r1ng · October 2nd, 2012, 09:18 AM

Thx moto, I was going to try connecting it to neg. side of fan next but wanted to ask first.

Motofool · October 2nd, 2012, 09:42 AM

You are welcome

October 1st, 2012, 05:57 AM	#2
Motofool Daily Ninjette rider Name: Hernan Location: Florida Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot. MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16	Justin, One leg of the fan is directly connected to the negative pole of the battery. The other leg goes to the radiator switch, then to the fuse #10, then to the positive pole of the battery (via starter solenoid). http://faq.ninja250.org/images/a/a4/...matic_-_R4.pdf Your light should be connected in prallel with the fan. One leg goes in between the fan and switch and the other leg connects to the negative leg of the fan. __________________________________________________ *Motofool* *.................................Never ride faster than your guardian angel can fly* "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí

October 2nd, 2012, 09:42 AM	#6
Motofool Daily Ninjette rider Name: Hernan Location: Florida Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot. MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16	You are welcome __________________________________________________ *Motofool* *.................................Never ride faster than your guardian angel can fly* "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí

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September 30th, 2012, 07:16 PM	#1
FvnnyL3tt3r1ng ninjette.org certified postwhore Name: Justin Location: Florida Join Date: Aug 2012 Motorcycle(s): Ninja 250 2001 Posts: A lot.	Radiator Bypass fan switch issue I just installed a switch which lights up when it is on (or is supposed to) to my radiator fan and it does turn the fan on but everytime I try to connect the "Earth ground" side of the switch to either chassis or battery -Neg the fuse blows instantly! I have tried multiple sites and the strange thing is I have the same model switch which works fine running for my LEDs right next to it. I have the switches terminals separated by heatshrink but right now I'm thinking the switch might be bad. I did a continuity test before I installed it and the switch was fine but maybe I damaged the switch somewhere in the soldering process.

October 1st, 2012, 07:35 AM	#3
FvnnyL3tt3r1ng ninjette.org certified postwhore Name: Justin Location: Florida Join Date: Aug 2012 Motorcycle(s): Ninja 250 2001 Posts: A lot.	If I connected it in parallel with the fan it would just short after the thermostatic switch opened. I have it connected in parallel with the thermostatic switch right now so it bypasses the temperature trigger. I just don't get why when I connect the "earth ground" pole of the switch (which completes the LED in the switch) the fuse blows instantly, even when I use the same ground as the fan's circuit on the switch????

October 2nd, 2012, 09:18 AM	#5
FvnnyL3tt3r1ng ninjette.org certified postwhore Name: Justin Location: Florida Join Date: Aug 2012 Motorcycle(s): Ninja 250 2001 Posts: A lot.	Thx moto, I was going to try connecting it to neg. side of fan next but wanted to ask first.