Fit manual switch to radiator fan

[stutrump]

Hi folks. Has anyone done a manual radiator fan switch and do you have any pictures to help me do it?? Would really appreciate any help. Mine has stopped working. Fuse etc is ok. Cheers

 

[greg the pole]

Fan should kick on at about 206-210 F. Not sooner.
If i'm not mistaken the signal to the fan relay is from the ECU.
So unless you want to get auxilary power from somewhere else to run the fan, i don't recommend it.

do you have any warranty remaining?

 

[Dogdaze]

Mine kicks in at 102-104°C in new money, are you sure it's reaching this temp?

 

[greg the pole]

Mine kicks in at 102-104°C in new money, are you sure it's reaching this temp?

right...I'm a confused Canadian. My Tenere was a US import so I have to deal with Imperial temps (wtf is 79F anyways ::015:
but everything else is shown in metric, thank dog.

 

[Don in Lodi]

Have you tipped over on the left side? Perhaps the motor has been burned out.

 

[WJBertrand]

Some re-flashes set the fan to come on at 205F. I think around 215 is the trip point from the factory.


-Jeff

 

[HeliMark]

Hoping that you will always keep the temp in the correct range manually will be a chore, and doubtful all the time. I would check the fan to see if it is pressing the radiator (poss drop on left side). Also directly put 12v to the fan and see if it works. If the fan works, check the thermostat for the radiator. Bike is pretty simple and easy to check.

Mark

 

[tomatocity]

I have 67,000 miles on two Tenere's. HAve had NO concerns... after I understood when the radiator fan functions. Fan on at 221F, fan off at 212F. Yamaha done goood!

 

[Standby diver]

It has been 100*F for the past week here, I have been watching my temp like a hawk, habit from my KLR. On at 221*f off at 212*f

Sent from my Nexus 5X using Tapatalk

 

[itlives]

Fan should kick on at about 206-210 F. Not sooner.
If i'm not mistaken the signal to the fan relay is from the ECU.
So unless you want to get auxilary power from somewhere else to run the fan, i don't recommend it.

do you have any warranty remaining?

As others have said, mine kicks on at 221F and off at 212F.
Sometimes, in traffic, I wish I had a manual switch. But, it works as intended.

 

[stutrump]

Cheers folks. Not dropped mine, no warranty and fan works on its own. Must be thermostat (doesn't kick in at any temp. Thermostat is a pain in the bum to get too but guess I'll have too! Thanks for your help.

 

[tomatocity]

Cheers folks. Not dropped mine, no warranty and fan works on its own. Must be thermostat (doesn't kick in at any temp. Thermostat is a pain in the bum to get too but guess I'll have too! Thanks for your help.

Is there a fuse inline with the fan?

Just checked the Service Manual. There is a 20 amp fuse for the Radiator Fan Motor.

 

[Don in Lodi]

Cheers folks. Not dropped mine, no warranty and fan works on its own. Must be thermostat (doesn't kick in at any temp. Thermostat is a pain in the bum to get too but guess I'll have too! Thanks for your help.

Thermostatic fan switch, not the thermostat. There is a fuse for the fan, it's been talked about before. When the fan gets jammed the fuse doesn't pop before the motor burns out.

 

[greg the pole]

Cheers folks. Not dropped mine, no warranty and fan works on its own. Must be thermostat (doesn't kick in at any temp. Thermostat is a pain in the bum to get too but guess I'll have too! Thanks for your help.

I've never had to look for the t-stat, if it exists.
I suspect that the ECU uses the same temp indicator as the dash. Not sure if that temp comes from the motor or a t-stat.
Based on temp displayed, ECU sends a signal to the fan relay.

 

[tomatocity]

Checked the Service Manual pages 6-4 / 6-5 and 7-6 / 7-7.

Looks like the Thermostat and Coolant Temperature Sensor are located under the Air Box and between the Throttle Bodies.

Thermostat...
... Fully closed @ 160 F
... Fully open @ 183 F

During cool weather on freeways my Tenere will run as low as 167 F. Very close to the Thermostat being fully closed.

Guessing you should check the Coolant Temperature Sensor and Thermostat.

 

[greg the pole]

Checked the Service Manual pages 6-4 / 6-5 and 7-6 / 7-7.

Looks like the Thermostat and Coolant Sensor are located under the Air Box and between the Throttle Bodies.

Thermostat...
... Fully closed @ 160 F
... Fully open @ 183 F

During cool weather on freeways my Tenere will run as low as 167 F. Very close to the Thermostat being fully closed.

Guessing you should check the Coolant Temperature Sensor and Thermostat.

Tim, but further to that, the ECU must have a setting on when to kick on the fan (206-210F)
The only way you will test the t-stat is by running the bike and see at what temp the t-stat opens, and the hose on the other side gets hot

 

[steve68steve]

A manual fan switch is dead simple to wire, even if it's not the "real" fix.


Unplug the fan and run an insulated wire from one of the plug's spade lugs back to one of the battery terminals. Run another insulated wire from the other fan plug spade lug into a switch, out of the switch into a fuse, out of the fuse into the other battery terminal. It's a bodge job for sure, but you should be able to turn your fan on and off via the switch.


I think if you get the polarity backwards, the fan will spin the wrong way (suck instead of blow)... unless there's a diode in the fan circuitry somewhere, in which case polarity reversed would prevent it coming on at all. If it doesn't come on in any configuration, the fan itself is fried. Pry apart the two case halves of the fan to confirm - it's only held together by the magnet inside.

 

[tomatocity]

Tim, but further to that, the ECU must have a setting on when to kick on the fan (206-210F)
The only way you will test the t-stat is by running the bike and see at what temp the t-stat opens, and the hose on the other side gets hot

The Coolant Temperature Sensor provides information to the ECU.

 

[silvergoose]

Thermostatic switches are cheap and easy to find. Go to any automotive shop and look for after market electric fans. The fans are signaled via a temp probe mounted on to the radiator. Simple and you will not forget, also the temp switch is adjustable.

Good Luck

 

[stutrump]

Thanks folks. I know the fuse is ok so I'll check the sensor isn't loose or something and then I'll scratch my head again or try to fit a manual switch. Cheers