Thread: radiator fans do not come on at over heat temperature

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  1. #1 Re: radiator fans do not come on at over heat temperature 
    I live here. 02NavyBlue's Avatar
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    Why did you order new fans if you said yours came on when jumped? Check all fuses first. If you confirmed that the relay was working, make sure that the wires leading to the power distribution box are hooked up and getting voltage. If so, check for power at the connector to the fans. If you get power there, but not to the fans, the contacts could be dirty. If you don't get power to the fans but did at the relay, check the wires and the ground. That may be the issue.

    You didn't mention what car you're driving, but assuming its a grand prix, and a 97-03 here's a wiring diagram.


    Check ground 117 and power to both fans, just keep tracking power til you lose it, then find out why.(assuming the relays do click but no fans)
    Last edited by 02NavyBlue; 10-25-2013 at 04:58 PM.
    2006 Grand Prix GT S/C 109k - Modded Transgo Shift Kit, Gutted Airbox, Dash Cam, and Inlays. Retros soon to come.
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  2. #2 Re: radiator fans do not come on at over heat temperature 
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    i will check grounds tomorrow,also pop the tops of all 3 relays to see if heavy contacts will activate when pushed in by hand..
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