Both radiator fans stopped working/ fan relay

Tiny
DHORNB1
  • 2004 NISSAN MAXIMA
  • 145,000 MILES

I have a '04 Nissan Maxima. Still trying to isolate the following problem:

The car started overheating at idle and the A/C started blowing warm air at idle also. I found that BOTH radiator/ac fans are not working. My local Nissan dealership suggested that the fan assembly could be bad but I find it hard to believe that BOTH fan motors went bad at the same time. I started thinking the problem could be a fuse or relay.

I looked up a diagram and I found that there are 3 cooling fan relays. Why are there 3 relays to only 2 fans? Whats the 3rd relay for? Do you think this is the likely problem? I'd figured i'd start with the relay since it is the easiest.

thanks for your help!

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Friday, September 7th, 2012 AT 2:19 PM

5 Replies

Tiny
KHLOW2008
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Start by testing the fan motors first. Quite often when 1 fan fails, it is hardly noticed until the second fails.

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Friday, September 7th, 2012 AT 2:37 PM
Tiny
DHORNB1
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I wouldnt even know where to begin on testing the motors. I have no voltmeter or anything, never really had to use one before & I doubt I would know how to use one even if I had one handy.

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Friday, September 7th, 2012 AT 2:52 PM
Tiny
KHLOW2008
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For electrical testings you would at least need a test light or DVOM. To test the fans, disconnect the fan connectors and ground one terminal while applying battery voltage to the other but this fan should have 4 terminals so you might make a mess out of it.

Get a DVOM or testlight first because to test the fuses or relays and their terminals you need to know if battery voltage is present.

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Friday, September 7th, 2012 AT 3:56 PM
Tiny
DHORNB1
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Will give it a shot, thanks!

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Friday, September 7th, 2012 AT 5:42 PM
Tiny
KHLOW2008
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Let me know if you need any assiatance on how to go about.

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Friday, September 7th, 2012 AT 5:48 PM

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