XJ750X - fan not working

Just wondering how I can go about testing the fan to figure out why it's not coming on. I have a new thermostat I can install, but I was wondering how to go about testing the various reasons it might not be coming on. I have already checked the fuse and it's fine. But I need to check whether or not it is being told to run, whether the fan motor runs or not, whether it is getting power properly, etc...

Thanks for any help.

 

Make sure your fan motor works, first. If so, I'd test the thermoswitch with a multimeter. You would have to remove the thermoswitch and monitor the resistance while heating the switch in cooking oil in a pan.

I can't find the specific procedure for the moment...I'll look into my X files...

 

Here it is:

 

You will need to make a little stand because the bottom of the switch shouldn't touch the pan.

here is the one I made, I used it for the sending unit (on the picture) and the t-switch

:

 

Awesome thanks! For some reason I did not find anything in my shop manual before, but now you posted a page and it led me to more troubleshooting steps.

 

Be careful when removing the t-switch, if it is stuck in there, use penetrating oil for several hours or even several days, it is brass and it is sort of hollow, easy to break.

 

I was trying this troubleshooting step as it seemed like it would be quick and easy, but I can't find the brown wire. I did however find a black wire that looked broken off, but I have no idea what it's for. I feel like this thing could use a total rewire, it's a mess.

 

I checked the wiring diagram, all I can see if that the t-switch is supposed to be blue and brown wired.

 

I'm wondering if I can just rig up a toggle switch for manual control of the fan. Right now when I see the temp starting to climb I get out on a faster road to get some air flow and watch the temp drop. I could very easily manage the heat with a toggle switch.

 

THat could be a good temporary solution. I had one on my own X.

 

So how would I go about rigging up that toggle switch?

 

I suppose you should disconnect both leads to the t-switch, and power your toggle switch with them. Not sure about that , I don't own my X anymore. You should probably add some extension leads, depnding on where you will locate the toggle switch.

 

Ok, I just went and had another look for the t-switch wires/connector again. I think I found it, but there is no connector, it was all taped up. This is what I found and it doesn't look exactly right to me. Any idea if this is it and how it should be? (configuration that is, I know it shouldn't be just taped like this...) There is a mystery black wire broken off loose not far from here towards the front of the bike (coming from the rear somewhere...) Would it be somehow involved in this?

 

Are the wires missing from the thermal switch? If a PO did some kind of mod and removed the wires you are looking for a blue wire per the print I have and the procedure that you posted. Very simple test, short Br to L where it ties to the thermo switch and the fan should run. If the wires are missing from the thermo switch try to follow them from the fan.

 

There are blue and black wires coming from fan. According to shop manual there was supposed to be brown to test for voltage and use to jump to the fan to test if t switch is not working. Just not sure which one it'd be looking at what I've shown here...

 

Are there wires connected to the thermo switch? Should be a two wire connector that connects to the thermo switch. Remove the connector from the switch and install a jumper between those two wires (brown to blue) to test the fan. Brown wire will / should have 12V on it. When brown wire is connected to blue wire 12V is applied to fan and it should spin.

 

I can't actually see the thermo switch, not sure what it looks like...

 

From an earlier post by Quebecois59:



The FSM's have lousy pictures, but can't you make this out to locate the switch?

 

Might be able to... Things aren't quite in the stock location, but certain landmarks shouldn't change too much... I'll have to check later tonight or tomorrow.

I'm still curious about what, if anything, I should do about that wiring bodge I found.

 

I don't even remember if the t-switch is on the LH side or the RH side of the bike when sit on it...or just behind the steering stem...