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Cooling fan issue need help

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Cooling fan issue need help

 
Old 09-02-2018, 10:23 AM
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Default Cooling fan issue need help

Okay, I need the help of those who are better with the electrics of these cars than I.

I noticed earlier this summer that my ’06 was overheating on hot days in traffic. So I checked and noticed that the cooling fan (passenger side fan, not the AC fan) was not running. The fuse under the dash was good, but the fuse under the hood was bad. Replaced that fuse and the fan worked. Later that day, it wasn’t working again. Both fuses were good. So I replaced the relay. The fan worked.

The next day, the fan was not working AGAIN. So I checked the fuses and they were good. I then went through the whole diagnostic in the service manual and the relay was bad. So I replaced the relay again. But this time, the fan still didn’t work. And I had decided I might need to get a professional involved.

Fast forward to yesterday. I went to watch the Indy cars at PIR and the car was in a lot all day. When I got back to it, the battery (a 15 month old Optima Yellow Top) was completely dead. A fellow race fan had jumper cables. This is when it gets weird. When we hooked up the cables, the cooling fan immediately went on. The car was coldish (74 degree day, not driven for 6 hours) and the car was not running. And yet the fan was running.

Anyway, I drive home, stopping to buy my own jumper cables along the way, not turning off the car. I get home, into the garage, and shut off the car and the cooling fan is running, with the key out of the ignition. Suddenly, the dead battery made sense. I opened the hood and pulled the relay and the fan shut off.

What is going on??? What weirdness is this silly car doing? Ideas? I hope you guys can help, cause if not, it’s off to a shop for more money than I want to spend. But will if I have to.

Ideas??
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Old 09-02-2018, 10:50 AM
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Sounds like your fan is faulty and burns out your relays and fuses.
It's not uncommon for a relay to fail and gets stuck ON.
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Old 09-04-2018, 07:06 PM
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Thank you. Very much.

Interesting update. Putting the relay back in did not cause the fan to restart. No issues since, though I don't think the fan has come on either. I can replace the fan motor But any other ideas I should check?
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Old 09-04-2018, 07:27 PM
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Default Cooling fan controller

RockAuto carries several Cooling Fan Controllers, and the have it listed under Cooling System, but I can't find it in my Honda service manual. I thought it might be that, but now I think it's not really the cooling fan, but the cabin climate control fan. Or am I wrong? Or is RockAuto?
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