Miata Mailing List: February 1999, Message #146

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-----Original Message-----
From: Joseph Haefeli & Guppy <jhaefeli@arts.unco.edu>
To: Multiple recipients of list <miata@list.miata.net>
Date: Sunday, January 24, 1999 20:48
Subject: Re: 2nd Radiator Fan

>
>As Jeff Crisconi of Peak to Peak astutely observed, you can simply
>disconnect the a/c fan from the a/c control circuitry, and connect the a/c
>fan to the main fan.  The reason this is okay is because normally when the
>a/c is turned on, it activates both the main and a/c fan relays (the a/c
>relay also kicks in the compressor if I recall).  So if you connect both
>fans to the main fan relay, either the thermoswitch OR the a/c will cause
>both fans to run!
>
>


Joseph


>From my reading of the schematics (which is not my strong suit) I would
agree with you about the simplicity of the solution.  The only question that
comes to my mind is that since the two fans normally operate off of
different relays would the thermosensor relay be adequate to handle the
current for both fans?  I don't have a clue except that fanmotors are
usually quite large users of 12V current.

I know that this question falls into the area that really bugs me...ie:  "I
realize you have been doing XYZ for ten years now in all kinds of
conditions...but does it really work? so forgive me...I'm trying to forgive
myself.

Ralph Alder
Tustin, CA
'90 Classic Red w/Yellow Stripes
Team  Aerodyne