Re:2 cents [alfa] Wiring a Thermo Fan

["Dean" <tessiedog@xxxxxxxxxxxxx>]

Hello Baylys
I have just wired two electric fans onto my gtv6 radiator which I have
fitted into my alfetta sedan. I have been in the country so I havnt needed a
fan but I am now back in the city, thus in traffic again. Anyway I just
wired to the back of the alternator and used a 25 amp in-line fuse connected
through the switch on the radiator. And of course a good earth. There is a
slight voltage drop at the batt when the fans come on but they work so well
they only stay on for about 10 seconds. Also the fans stay on if required
when the car is turned off. If you want to use a switch inside the car then
thats when you should use a relay. The switch then turns the relay on which
in turn carries the current to the fan insted of drawing the current through
the switch. If you understand what the relay does that should make sense...I
think?
Cheers
Dean
-----Original Message-----
From: The Baylys <dabaylys@domain.elided>
To: alfa digest <alfa-digest@domain.elided>
Date: Saturday, 10 April 2004 12:51
Subject: [alfa] Wiring a Thermo Fan


>Hi all,
>
>My 1750 engined '67 RHD Duetto has an electric radiator fan fitted (aka
>thermo-fan in Oz).
>
>PO's wiring expertise was not good so I'm re-doing the lot, and have a few
>questions.  I've pretty much made my mind up but there may be an issue I've
>missed.
>
>1.    I have both 70A and 30A relays.  Is 70A overkill for a small thermo ?
>2.    Do I run the fan's main power without a fuse directly from a 'hot'
power
>source such as alt, batt, or starter ?
>3.    Do I run the relay 'switching' power thru a fuse ?
>
>Thanks in advance
>
>Beatle
>'67 Duetto 1750 hybrid
>Oz
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