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Radiator fans failure

Discussion in 'Technical Q&A' started by sjmst, May 23, 2005.

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  1. sjmst

    sjmst F1 Veteran
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    Jul 31, 2003
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    Sam
    #1 sjmst, May 23, 2005
    I think this must be a simple problem (I hope). The radiator fans on my 82 Mondial fail to kick on when they should. The fuse looks fine. Relay? Any tips on how to fix?
    Thanks
    Sam
     
  2. Ferrari_tech

    Ferrari_tech Formula 3

    Jul 28, 2003
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    Malcolm W
    #2 Ferrari_tech, May 23, 2005
    Last edited by a moderator: Sep 7, 2017
    Could be the switch that is located in the bottom of the radiator (#37 in picture) - pull off the two wires and join together, turn on ignition and if the fans run then it's the switch.

    Could also be a bad earth or a faulty relay.
    Image Unavailable, Please Login
     
  3. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    Jan 11, 2001
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    Steve Magnusson
    #3 Steve Magnusson, May 23, 2005
    Sam -- If you fail the test that Malcolm suggested, can you provide the Bosch(?) part number on the outer case of the "G relay for water fans"? The next thing to try for diagnosis would be removing the G relay and:

    1. jumping the right terminals in the relay socket (to simulate a "closed" G relay) and checking if the water fans run,

    and, if you fail that,

    2. confirm/deny if +12V power is present at the appropriate relay terminal in the relay socket.

    But they don't give any part number information in the US Mondial8 OM for relay G so I can't get specific with terminal #s.
     
  4. sjmst

    sjmst F1 Veteran
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    #4 sjmst, May 23, 2005
    Thanks for the replies! Vey helpful. I will check these things ASAP.
    Sam
     
  5. spang308

    spang308 Formula Junior

    Jul 17, 2004
    893
    York, PA
    #5 spang308, May 23, 2005
    Mine just decided they want to run all the time!!
    Come on whenever the key is turned to the on position.
    Any thoughts??
    Fuse block finally bit the big one??

    1984 US 308 QV, by the way.

    John
     
  6. Dr Tommy Cosgrove

    Dr Tommy Cosgrove Three Time F1 World Champ
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    #6 Dr Tommy Cosgrove, May 23, 2005
    It just started doing this or was like that since you bought the car?
     
  7. spang308

    spang308 Formula Junior

    Jul 17, 2004
    893
    York, PA
    #7 spang308, May 24, 2005
    Just started.

    John
     
  8. Dr Tommy Cosgrove

    Dr Tommy Cosgrove Three Time F1 World Champ
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    #8 Dr Tommy Cosgrove, May 24, 2005
    Can anyone recommend the wiring method if I wanted BOTH fans to come on instead of one and still have the a/c switch them on too (in case I turn on the a/c when the fans are not running at that moment)?
     
  9. sjmst

    sjmst F1 Veteran
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    Sam
    #9 sjmst, May 27, 2005
    Yep. It was #37 in the pic. My bro in law is an electrician and he fixed it. Got the relay (std Bosch item) at discount from a friend in auto parts.
    $12.00

    Had I taken it to the dealer, what, 1 hour labor plus maybe $60.00 for the part...maybe $200.00? I would have thought I got away cheap.
     

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