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How do I run my cooling fan from a switch
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Fasteddie313  



Joined: 29 Sep 2013
Posts: 1432
Location: Not Detriot - NMI

PostPosted: Thu Aug 28, 2014 3:03 am    Post subject: Reply with quote

I wired mine...

alternator power 1 into 2 (both fans), then fans ground to thermofan switch, then thermofan switch to alternator ground...

and it works excllent... I could prolly use an inline fuse just off of the alt power but I haven't yet...

the only good power under the hood of my car that I know of is that alternator power because my main battery power wires are now hooked up just under the starter motor..

I had to get the air filter housing out of my way a bit to get to that thermofan switch but it wasn't that difficult..

I just figured id add a successful hookup to the end of this thread for anyone who reads this down the road trying to do the same..

thanks all for the help..

edit: thermofan, not thermotime...
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1980 931S LSD FMIC hobby - 01 RS25 coupe - 95 M3 coupe - 06 X5


Last edited by Fasteddie313 on Wed Oct 08, 2014 7:39 am; edited 1 time in total
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!tom  



Joined: 28 Aug 2006
Posts: 1869
Location: Victoria, BC Canada

PostPosted: Sat Sep 27, 2014 1:37 pm    Post subject: Reply with quote

Thermotime switch is intended to operate the cold start injector.

Are you sure you have described your setup accurately?
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Fasteddie313  



Joined: 29 Sep 2013
Posts: 1432
Location: Not Detriot - NMI

PostPosted: Wed Oct 08, 2014 7:34 am    Post subject: Reply with quote

omg...

THERMOFAN switch.... not thermotime...


my apologies, blond moment
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1980 931S LSD FMIC hobby - 01 RS25 coupe - 95 M3 coupe - 06 X5
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pmcaya2  



Joined: 24 Nov 2005
Posts: 183
Location: Scio, NY USA

PostPosted: Tue Jul 18, 2017 12:44 pm    Post subject: You already have a fan switch Reply with quote

I have my fans running full-time. No switch needed ===> just turn on the AC fan and they will run! PS I know its cheap and easy to replace the thermo switch, however, cracking the radiator wasn't worth the risk for me.
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