[DeTomaso] cooling fan blowing fuse

[Brian Hill]

Thanks for verifying that.  I have learned to remove the passenger side seat.  
Makes it easier to get up there.

I have acquired a clamp on ammeter from sears.  when I apply power to either 
motor the amp readings start at 17 and go down to 10.  So now I ask...is that 
normal?
Keeping in mind that I have aftermarket high volume fans.  

Brian






________________________________
From: "MikeLDrew at aol.com" <MikeLDrew at aol.com>
To: mazdastuff at yahoo.com; SCPOCA at yahoogroups.com; detomaso at realbig.com
Sent: Mon, November 1, 2010 9:17:47 PM
Subject: Re: [DeTomaso] cooling fan blowing fuse


In a message dated 11/1/10 19 02 19, mazdastuff at yahoo.com writes:



Thanks Doug, Orville, and J.  Looks like I have some work ahead of me.  Oh well,
>weather is getting cooler so it will be more fun to work on.  J mentioned some
>relays that might also be damaged due to the way they are mounted on the car.  
>I am aware of the cooling fan relays under the dash on the passenger side.   
Are
>there others mounted in the front?
>

The later cars (1972 and later) mounted the fan relays immediately behind the 
radiator on the passenger side, attached to the front of the front trunk 
compartment sheetmetal.   The 1971 cars like yours mounted these same relays on 
the relay panel under the dash, behind the glovebox.

There is no philosophical distinction; the relays function exactly the same in 
either case.   There's no risk of damage by having them in the cabin; they are 
just less convenient to work on.

The later cars powered the fans by fuses #11 and #12; #11 was 15 amp and #12 was 
25 amp (it also had some other jobs to handle at the same time).   The early 
wiring diagram shows both fans powered by a single fuse (it appears to be fuse 
#14, which would be one of the window fuses?); I don't see a fuse power rating 
listed however.

Methinks your problems may be associated either with more-powerful fans, or fans 
that are degraded and thus have a higher-than-normal amperage draw, combined 
with the flawed philosophy of powering both fans on the single fuse?

Mike