skoh

yeah so my fan doesn't like to come on until about 240 degrees and sometimes even higher. what regulates this or negates this from happening.. discuss. thanks in advance.

old man roger

there is a temperature sending unit on the lower left side of your radiator on an 03 04 636 it turns the fan on and usually doesnt go bad , you may be low on coolant so the sending unit isnt getting the correct temperature...

i have wired a switch in between the two wires going to my sending unit so i can turn the fan on when i want but if i forget to turn it on the sending unit will ..

skoh

excellent idea.. tutorial plz .. hah jk.. I'll have to figure this one out.. sounds pretty trivial and for big benefits.. well givein u dont forget to turn ur fan on

old man roger

if you forget the temperature sending unit will still turn it on at the factory setting ...

there are two wires going to the sending unit if you were to touch them together your fan will come on so just wire a toggle switch in between the two wires but leave them plugged into the sending unit ..

skoh

thanks roger, i'm gonna do this mod tomorrow.

old man roger

remember to check your coolant level

skoh

Hmmm yeah.. well my overflow bottle is empty.. coul dthat be why

StrictlyStunt

do the switch mod

old man roger

you may have a coolant leak some where , very common for hoses to need re tightening after they have been removed and put back on

chipottley

That is a great fu**ing idea! thank you!

Towlieee

check inside the radiator

top it off with distilled water and/or antifreeze

If it's really low, or if you have ever drained the coolant, let the bike run with the radiator cap off tell it gets over 190f

slidewayz89

So i need to do this to my 05 636 same thing i guess ill go get some wire and a switch tomorrow and give this a shot any idea what this will look like the little temp thing

old man roger

the 05 is different , you can still make it work the same way but you have to wire it different , sorry i have not done one so i cant tell you how but i do know the sending unit isnt on the radiator on the 05 it is on the left rear side of the cylinder

slidewayz89

No **** does anyone know how to do it...well im sure they do but hopefully they will chime in.
Let me know if you figure it out omr

SliverR6

I wired my fan to a toggle on the 05 636. Connected the wires coming off the fan to a toggle and to the hot horn wire. Still comes on at 215 or whenever I use the toggle switch.