Fan won't turn on. 92 Si
Senior Member
Joined: Nov 2005
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just tested my fan today i got two wires conected them to the harness on the fan and ran them to the battery, the black fan wire with the red spots on it is your hot and the other your gorund, run the hot to the battery hot and the ground to the battery ground or frame it should come on if fan motor is good
Thread Starter
scrotal surge
Joined: Oct 2005
Posts: 15,460
Likes: 0
From: Cali
Could that be the thermo switch? I've been waiting to take mine off. Can't get my hands on a wrench to get it off. It's like 23mm or 24mm. I have sockets, but nothing deep enough to get if off.
v-card member alpha
Joined: Oct 2006
Posts: 4,010
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From: Assplosion, NE
Thanks Civic2Scooby
I've been meaning to get around to this for a while.
I know it's an old thread but I wanted to thank Mr. Civic2Scooby for the great pic and advice in this thread that led me to solve my fan problem last month.
For those who may have a similar issue - my car never overheated, even sitting in a drive thru last month for 10 minutes after drving several miles in 80 degree heat, not only did my fan not come on once but the temp guage never read over half way(it's normally just below 1/2). In fact, when I left the drive thru I noticed for the first 30 seconds that the car didn't feel normal, like a lack of power
This was the occasion that convinced me something was wrong.
I don't want to go into the long, boring specifics but the guage does in fact work correctly to the best of my knowledge.
Last year, also during the summer, my fan would come on sometimes but it took a very long time, I just thought it was normal for 5th gens civics or that running ethanol might have to do with it.
Now with the new thermoswitch (not a spoon, regular from Beck/Arnley) it comes on 2 or 3 times on the rare drive-thru visit. That's even in 70 and below weather.
Obviously the thermoswitch wasn't working correctly for a long time and the ECU was compensating by retarding the ignition and running rich, I just had no idea.
Anyway, for posterity, here's an attachment photo that Civic2Scooby posted in another thread.
I know it's an old thread but I wanted to thank Mr. Civic2Scooby for the great pic and advice in this thread that led me to solve my fan problem last month.
For those who may have a similar issue - my car never overheated, even sitting in a drive thru last month for 10 minutes after drving several miles in 80 degree heat, not only did my fan not come on once but the temp guage never read over half way(it's normally just below 1/2). In fact, when I left the drive thru I noticed for the first 30 seconds that the car didn't feel normal, like a lack of power
This was the occasion that convinced me something was wrong. I don't want to go into the long, boring specifics but the guage does in fact work correctly to the best of my knowledge.
Last year, also during the summer, my fan would come on sometimes but it took a very long time, I just thought it was normal for 5th gens civics or that running ethanol might have to do with it.
Now with the new thermoswitch (not a spoon, regular from Beck/Arnley) it comes on 2 or 3 times on the rare drive-thru visit. That's even in 70 and below weather.
Obviously the thermoswitch wasn't working correctly for a long time and the ECU was compensating by retarding the ignition and running rich, I just had no idea.
Anyway, for posterity, here's an attachment photo that Civic2Scooby posted in another thread.
Joined: Jul 2003
Posts: 28,282
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From: michigan
hey no problem. As always if you every feel like you aren't getting the anwers you need in the forum feel free to PM me and I will answer them as best I can via internet. As with anything my diagnosis can't be anywhere near as accurate as when I can touch/listen/scan but I will do my best to help anybody as best I can.