Question about 2005 Gas Gas EC 450 FSE

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Thermo Fan Had heating issues with my fse06 450 on the weekend. Thermo fan wasnt working. Have replaced relay and bypassed fan to make sure it was working. Still no luck. There would have to be a heat switch or thermostat to turn on the fan

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Anyone know where this is located. Or is there another problem I should be looking at?Temp sensor is located at the left rear of cylinder head. Fan relay is controlled by the EFI computer. Does your fan run if you hook it up directly to the battery? To have the fan running by jumping/bypassing the relay you need to have your engine running. There is a wiring diagram in the '05 user manual,,,

Posted on Nov 10, 2008

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I have a 2009 vino 125 scooter The thermostat switch went out Is there a way to bypass the switch and what does the switch actually control


The thermostat will control the cooling fan if insufficient air is passing over the engine. I would therefore not recommend bypassing this as serious damage to the engine could occur if it overheats. If you do bypass (by connecting the two wires together) make sure the fan runs all the time. Running cool is better than overheating but better to buy a new thermostat. You bypass at your OWN risk.

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they were paranoid the bike was going to over heat if they did not have control of it/ the old switch possibly gave up and they bypassed it instead of replacing it/ they were riding that bike HARD and did not want to run the risk of the self managed cooling to stop while riding.


or the cooling system was stuck on and over cooling the engine. i have myself bypassed thermo fan relays in cars for switches in the past because the relays were not working anymore for whatever reason they gave up for. i would not stress if its a switch, just make sure its working well when you go riding it and do not forget to turn it off after your done

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Drain the coolent, fan switch is usually on the radiator 2 wire switch disconnect wire coupler unscrew and replace.
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I was sitting in traffic today and my coolant temp light came on I looked down the fan wasnt running it was on for a couple min till traffic picked up again didnt come back on so when i got home i grounded...


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1 Answer

Thermo fan will not work on 1996 klx 650, when engine is running or hot, there is a wire to the sensor and another which is broken, beside it. Should the broken wire be connected to something? If so, what?...


Hello;
Let's figure this out. Broken or otherwise disconnected wires usually cause an open circuit preventing adequate current to a componant. Two wire switches act as light switches do. they either close or open a circuit.In this case, the warning lamp or fan relay is ativated when the temp rises. Cold, the circuit is open/ broken preventing any controlled componant from activating.
First check for any power/voltageat the disconnected wire and the connected wire. Which ever wire that is powered is the supply wire. The one without is your controlled componant wire. Touch the two wires together, bypassing the switch. The fan should come on and turn off when disconnected again. Ignition switch needs to be on.Because of the load the fan pulls, a relay is between the fan and switch.
The switch closes powering the relay, then relay close contacts closing a secondary circuit which in turn permits power to the fan. The fan circuit is powered by the battery and controlled only by the relay.
Yuup, two circuits. Switching and fan drive circuits. Yes, Hook the wire back onto the switch after testing as outlined here. Good Luck and remember to always verify power (fusec ondition). _Ned_

Apr 03, 2011 | kawasaki KLX 650 R Motorcycles

1 Answer

2004 Suzuki Eiger. My cooling fan is no longer coming on. Used to work fine and came on. For some reason it no longer does and the engine light will come on now when it's hot. Cannot locate my owners...


Check all fan connections and fuse for the fan. Also the Relay for the thermo fan. The fan also has a thermostat, that is most likely the cause, a faulty thermostat or Relay.
Sorry i cannot tell you exactly where these are located on your model.

Sep 02, 2010 | Suzuki GSX 400 F Motorcycles

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The cooling fan will not come on. Tested fan separately, it works. I by passed the heat sensor as Clymer suggested and ground the heat sensor wire to the frame to try to make the fan come when the ignition...


Use the process of elimination, you know the fan is good, now you should test the heat sensor. when the bike is cold the heat sensor should not let power past it to the fan, but when the bike is warm then the sensor should then let the power through, so test it either with a test light or an ohm meter! If the sensor is bad then thats the problem if not then check the wiring diagram to make sure there is nothing else on the same circut! If you need further help just drop me a line!

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it could be a few different things, first thing i would check is the fuse, if the fuse is ok, unplug the fan and jump it stright from the battary to make sure your fan is still ok. if the fan dont turn stright from the battary then replace the fan. if it does turn ok then you have a thermo switch that sences heat and tells the fan to kick on, what you need to do to check this switch is, unplug the switch, take a peice of wire maybe about 4 to 6 inches long, strip both ends and connect them to the leads inside the plug.. kinda like direct connect, turn on the ignition and see if the fan turns.. if not, replace the thermo switch. the only other possibility is in the cooling system wireing witch i dont know much about.. i just went threw the same thing with my 2001 yamaha r6 and i changed the fan and it was still popping fuses when the fan was supposed to come on. After 2 days of checking and trying i made the descovery that a wire harness was hitting the fan blade causing it not to turn.. i hope this helps you out and good luck..

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1 Answer

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mine did the same thing, im no expert but on the top of the radiator theres a plug on the top right side. its called a thermo-switch and that makes the fan kick on around 190 or so. pull that out and replace it then she should run cooler

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