Official Electric Fan wiring thread!

[SHunter]

Well, that makes sense. These cars definitely have a weakness in the cooling system and I guess the 80C can buy you some time when things go haywire.

I'm still gonna stick with the factory setup for now since my entire cooling system is new, I don't have AC, and I live in a pretty cool environment. Hoping that big 'ol fan I just bought keeps the temps rock steady.

-Steven

[328ijunkie]

If you're running no clutch fan you have to get a Lower temp switch like a 88-98 as the stock one is designed around a clutch fan being thete

[BoostinEuros]

Are there any alternatives to the temp switch you linked? They seem to be out of stock everywhere I check (Pelican, RMeuropean)

[eurosport22]

bump with boostineuros. i cant find one place that has them in stock

[bstarr3]

Sorry for the dumb question, but what additional wiring, relays, connectors etc do I need to wire a fan exactly as described in post #1? I know nothing about wiring, automotive or otherwise. Am I running wires from the temp switch and from the aux fan harness into the new fan? My new fan only has two wires and a plug connector. Thanks fit helping a noob

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[NERDE30]

I got a question for you guys . I can not seem to figure out which 80deg thermostat to us with my S50 . Can anyone point me in the right direction ?

[Lithium]

Sweet!!!!!

I just hooked up the 82 Deg fan switch that I got from http://www.bimmerspecialist.com - It was under 10 Bucks - I connected the two wires from the high speed and that was it - It works perfectly - Comes on when it hits 82 exactly and only runs for about 30-45 seconds and the motor cools right down.
Great Mod - Great Thread - Most helpful > THANKS!!!!

PS: I am using the stock fan with AC deleted.

[Fusion]

Guys, if the two top wires on the °o° radiator switch get flipped, will the fan speed be fast then slow?
I ask because I had to fix the wires there that broke off and now I think I heard the fast speed come on first, which leads me to think I might have flipped them. They were both yellow, iirc, one y/brown, the other y/purple.

[singh336]

I just hooked up the 82 Deg fan switch that I got from http://www.bimmerspecialist.com - It was under 10 Bucks - I connected the two wires from the high speed and that was it - It works perfectly - Comes on when it hits 82 exactly and only runs for about 30-45 seconds and the motor cools right down.
Great Mod - Great Thread - Most helpful > THANKS!!!!

PS: I am using the stock fan with AC deleted.

What aux fan is best to use for space / CFM , i don't care about noise really, just want something for a good price.


I searched for the fan switch you for, found it for 8.99, should I be searching for that under my E30, or for an E36/E34 for the M50 motor?

Where does this thread into and does it directly fit or need to be rethreaded because I thought one of these temp sensors needed to be rethreaded?

[Lithium]

What aux fan is best to use for space / CFM , i don't care about noise really, just want something for a good price.


I searched for the fan switch you for, found it for 8.99, should I be searching for that under my E30, or for an E36/E34 for the M50 motor?

Where does this thread into and does it directly fit or need to be rethreaded because I thought one of these temp sensors needed to be rethreaded?

82 deg fan switch is from a 1984 318i - it screws right into the rad no worries.
I am using the stock fan - there are allot of aftermarket options & opinions to match - but for 33$ Ireland Engineering has a 14" fan that should do the job.
PM me if you need any more info.
ChrZ!

[singh336]

awesome, thanks!

[eurosport22]

i hooked mine up so that high speed is the one that always comes on. i also used the 82 degree fan switch.

http://www.rmeuropean.com/Part-Number/Auxiliary-Fan-Switch-2-Prong-(White-Top)-82-deg-C-__6131136427282_FAE_10832E0B.aspx

i dont know where my resistor went but if it doesnt run very long then it shouldnt make a difference. i used a spal 16" pusher wired up like in the first page and it works perfect. the only thing is i had a factory 15amp fuse in the box so when i hit the switch it poped right away. threw a 30 amp in there and boom. perfect.

http://thmotorsports.com/spal/spal_fans/30102048/i-520006.aspx

its a little pricey but it moves over 2,000 cfm's and its gets to the mid to high 90's here in md over the summer so i figured id be safer than sorry

[328ijunkie]

Glad to see people still mostly referencing this thread vs making new ones lol. ;)

[36brua]

I always just utilize high speed and use this switch: (61-31-1-364-272..
ok I give up. Where is this switch is installed ? replaces temp switch in side of radiator? and if in radiator my connector is 3pin 89 E30
thank you

[325e10]

I always just utilize high speed and use this switch: (61-31-1-364-272..
ok I give up. Where is this switch is installed ? replaces temp switch in side of radiator? and if in radiator my connector is 3pin 89 E30
thank you

yes replace the 3 pin switch with the 2 pin switch.