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Post by mexicanbandit on Jul 23, 2007 2:51:50 GMT -5
My rad fan isn't working. I've bridged out the rad temp switch and it does work fine so I replaced the switch. still doesn't come on. Took fan off cleaned earth connection as it was rather covered in crap. Thats as far as I've got havent tried it yet since that. Does anyone know what temp it is suppose to kick in at and what that corresponds to on the gauge?? Its got to be something in the wiring if cleaning the earth connection up doesn't work.
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Post by ntvnick on Jul 23, 2007 3:48:36 GMT -5
If you have bridged the connections on the switch and the fan kicks in, that proves that the earth is good. I have never had the fan start on my bike. I'm not sure what the switch is set to as I am at work without the manual. The switch can be tested though with a pan of water on the stove. Just heat it up with it connected to a multimeter or battery and bulb and note the temperature that it switches at. I suspect that as you changed the switch, you just haven't got the engine hot enough yet.
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Post by mexicanbandit on Jul 23, 2007 4:33:29 GMT -5
thats what i'm kinda of assuming but on the gauge in the clocks the needle was nearly in the red
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Post by derbyshirebill on Jul 23, 2007 5:52:51 GMT -5
Hi, I've had my fan come on on really hot days in traffic. It comes on when the temp guage is about 2/3 the way up. The sensor usually triggers just above 90 degrees 'C'. With the ignition on, I suggest that you test that power is getting to the sensor (multimeter or a bulb). If not, it's your wiring or fuses. If you get power, check that the wire from the sensor to the fan is continuous. If that wire is ok it looks like the sensor is kaput. Or you could just make sure you ride fast all the time! Cheers, Bill
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Post by everydaybiker on Jul 23, 2007 7:50:47 GMT -5
Just on the off chance, you haven't changed the coolant recently have you? Having refilled the system if you get an airlock near the switch, that can cause it not to work as it doesn't get up to temperature, despite (very) hot water elsewhere in the system, e.g. around the temperature guage sensor.
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Post by mexicanbandit on Jul 23, 2007 9:27:08 GMT -5
I have changed coolant recently but the fans never worked since I bought it last year. Fuses are fine as the fan does work when wired to earth. Might change the sensor on thermo housing cuz it looks a bit crappy anyway. cheers guys will kepp you lot updated
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danny
New Member
Posts: 14
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Post by danny on Jul 25, 2007 6:38:00 GMT -5
Hi
I fixed my fan a couple a months ago. Checked the fan it self by connecting a battery. The fan didn't come on. Took it apart and examined and it turned out that there were no contact between fan rotor and contact pins (located in plastic unit, you can take it apart with some mild force) a lot of WD40 and the pins eventually came out. Voila, saved me some money.
Now the fan comes on at about 2/3 of white marking. Hope it will help.
Danny Danny
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Post by bronskimac on Aug 5, 2007 9:52:07 GMT -5
The thermo switch for my fan packed up recently while away on a long trip. I rigged a simple switch to my handlebars so I can manually switch on the fan if the temp gets high.
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Post by honda on Aug 5, 2007 10:36:25 GMT -5
Radiator fan switch? We all know in this case the geniune one is too expensive so here's an alternative. Go to a motor factor, auto electro outlet/repairer who stocks LUCAS electrical equipment and get yourself lucas nunber SNJ100. Its from a NISSAN something, if anyone needs to know what model I can go and check. This switch comes on at around 90 so is a little lower than the origonal but that will do no harm as a matter of fact probably better. It also comes with two wires instead of one, so just earth one and put the other to the origonal switch connection. This switch is for switching on a larger output fan than the tinsey wee things on a bike so is more than up to the job. I however have mine wired through a relay as fan switchs even on cars give trouble unless origonally powered via relays. Maybe some will think thats a bit overkill but it works and keeps working. I also had the problem of the brushs sticking inside than fan, so dismantled the thing and freed them up. Another thing while we are on cooling/heating is that some of these bikes run too cool most of the time. Check the thermostat hasnt fallen apart allowing free flowing of the coolant even when cold as this running at cool and varying temps does no good to an engine nor economy. A replacement stat from a breakers should be able to be got for a few ££s if not and you dont like the cost of new here's a real cheap skate one for you all. Go to an aftermarket supplier of Landrover parts and get a thermostst for a 2.5ltr Landrover 90/110 circa 84 for buttons. This will need a bit of a trim but be carefull and it will fit without fouling either top nor bottom. This is a bit heath robinson or maybe a miserable g--- type of a job but it works and it done me for a few years and kept my engine from running like an ice box in colder weather. Honda
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Post by dpmiller on Aug 6, 2007 1:59:55 GMT -5
Funny, I recall recommending that Lucas thermoswitch to a biker on the Toyota Townace forum I frequent, some years back. Must've caught on!
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Post by honda on Aug 6, 2007 5:30:07 GMT -5
I just used the Lucas number but I am sure bosch etc have replacements also. I'm glad to see you on here as I think we have met a couple of times but I dont want to say on here as some of the things I come out with might not go down so well in some quarters. If you think who else you have met who owns one of these and that wont be too difficult you will probably remember. I just reading about the meet on UK yesterday where they got five all at one time. They seem to have had a nice day. Its a pity it was a bit out of our way. Cheers Honda
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