Radiator Fan relay

Tiny
PAULNGUYEN
  • MEMBER
  • 2006 HONDA CIVIC
  • 1.8L
  • 4 CYL
  • AUTOMATIC
  • 94,000 MILES
I don't know where my radiator fan is. Can you show me where it is please? I try to look it up on the website but I don't see it. Thank you very much. Right now my radiator fan doesn't work even I changed temperature sensor, fan switch, thermostat, check the fan motor, but it still doesn't work yet. Please help me?
Saturday, March 22nd, 2014 AT 9:33 AM

11 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
The coolant fan relay is in the underhood fuse/relay box. #15 in the picture, also the fan control and diode #8.

Are there any applicable trouble codes? Some of the national brand autostores will check codes for free. How hot is the engine getting in degrees F?

Also check the fuses 36 and 7 in the diagram. Not only check the fuses, check for voltage on the fuse circuits. One fuse circuit is hot all the time, the other goes hot with the key on.
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Saturday, March 22nd, 2014 AT 1:05 PM
Tiny
JDL
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Hi Homer, when I first saw the post, I thought the same thing. Then I saw the bold black lettering at the top of the post about radiator fan relay, so I gave the relay location.

I've been confused on other posts, because the wording on the post question was different than the bold black lettering on the post itself, anymore, I check both.
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Sunday, March 23rd, 2014 AT 12:01 PM
Tiny
HOMER1967
  • MECHANIC
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I never noticed that at all, thank you jdl for your help and for pointing that out to me. And to paulnguyen I apologize for my incorrect answer and my confusion.
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Sunday, March 23rd, 2014 AT 5:58 PM
Tiny
PAULNGUYEN
  • MEMBER
  • 7 POSTS
I just replay the relay. The radiator fan still doesnt work.I dont know if there is anything that I can check. Please help me. My fan which doesnt work right now is on the driver side. Is it the radiator fan? Thank you very much
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Monday, March 24th, 2014 AT 6:59 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Did you check the fuses like I asked? Did you have the system checked for applicable trouble codes? Unless you can answer some of my questions, I'm going to have a tough time trying to help.

You could use jumper wires on your fan connector, just to see if the fan will run. Run the jumpers from the battery to fan connector. At the fan, brown wire is voltage, run from positive side of battery. At the fan connector, red wire is ground, the negative side of battery is ground. It would be safer to use an inline 20 amp fuse on one circuit. At least that should show you if the fan will run or not?
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Tuesday, March 25th, 2014 AT 8:01 AM
Tiny
PAULNGUYEN
  • MEMBER
  • 7 POSTS
I dont know how to check the relay on 7# but can u tell me the name of the relay 7, so I can go to buy it.
Before I also get the jumper wire to connect between the fan and battery. The fan works, it means that motor of the fan is still fine.
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Tuesday, March 25th, 2014 AT 9:38 AM
Tiny
PAULNGUYEN
  • MEMBER
  • 7 POSTS
In my fuse box in my car, I dont have the relay number 4. What is the relay number 4? Can u tell me where the fuse 36. I cant find it. Thanks
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Tuesday, March 25th, 2014 AT 9:44 AM
Tiny
JDL
  • MECHANIC
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The info I looked at said except hybrid.

If you use a jumper wire between terminals 1 and 2 according to the diagram already posted, radiator fan relay, the fan should run. By using the jumper, your bypassing the relay. That #1 terminal is hot all the time for that relay is hot all the time.

If the fan doesn't run, something is wrong with the fan---voltage wiring circuit or ground wiring circuit.
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Tuesday, March 25th, 2014 AT 12:19 PM
Tiny
PAULNGUYEN
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  • 7 POSTS
I checked the radiator fan relay in the location 15 already. So I guess there is only way that I have to replace the locstion 8. Those possible place I replaced new parts.I have spent 2 months and I cant fix it.
I will describe how my fan works.I have honda fit and civic. In honda fit, the a/c fan and radiator dam run at the same time, but in my civic, first I thought radiator fan will run when thw engine is hot, after driving for 30 min, it still doesnt run.
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Tuesday, March 25th, 2014 AT 9:18 PM
Tiny
PAULNGUYEN
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  • 7 POSTS
My means I changed new radiator fan relay in #15
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Tuesday, March 25th, 2014 AT 9:20 PM
Tiny
JDL
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I understand, The radiator fan relay is new, but, the relay control circuits could be faulty, that is why I told you how to bypass the relay with jumper wire. Even if you replace the relay, if there is a problem with wiring circuit to and from relay, the relay still won't work.
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Wednesday, March 26th, 2014 AT 10:00 AM

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