[DeTomaso] Before my fans wouldn't run... now they won't shut off!

[Tony DiGiovanna]

I don't quite think so.  I have the Mosely kit, and my fans definitely shut
off with the key.

-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of MikeLDrew at aol.com
Sent: Wednesday, June 09, 2010 6:58 PM
To: charlesmccall at gmail.com; detomaso at realbig.com
Subject: Re: [DeTomaso] Before my fans wouldn't run... now they won't shut
off!


In a message dated 6/9/10 13 54 3, charlesmccall at gmail.com writes:


> What could be possible causes? I have a late-model car, with the Rick
> Moseley kit installed with relays in the front trunk.
> 

That's the cause.

The stock fan scheme has the fan relays powered by *switched* power.   The 
Moseley kit sends *unswitched* power to the relays.   The ground is provided

by the thermoswitches in the radiator.   So the fans will continue to run 
after the key is shut off, until the temperature drops enough to open the 
switch and thus remove the ground from the relay.

There is a way to rejigger the system so that another relay is added to the 
mix, so that the power from the aux fuse block on the relay kit panel first 
passes through an ignition switched relay.   That way, the power is removed 
when the switch is turned off.

Or something.

Mike
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