[DeTomaso] Blower mystery demystified

Wed Aug 15 14:02:09 EDT 2012

My experience from driving a Mercedes with such a circulation pump broken
for several years is that it doesn't block water flow when not running. It
aids heating when the car is at idle for prolonged periods but as soon as
engine revs are off idle it makes no noticable difference. This would apply
to a Pantera too if the heater is connected to the stock conecctions on the
engine.

My experience from driving a Pantera is that when the lever is set to "Hot"
it gets crazy hot in the car. When you want heating for driving in temps
around 10 C you work with the lever very close to the "Cool" end of the
scale.

Tomas

-----Original Message-----
From: detomaso-bounces at realbig.com
[mailto:detomaso-bounces at realbig.com]On Behalf Of B. Seib
Sent: den 14 augusti 2012 21:59
To: DetomasoList; Dave Londry; Jim Gray
Subject: Re: [DeTomaso] Blower mystery demystified

I did something similar Jim, but I managed to make mine more complicated.
8>)

I used the original three position switch in the stock bottom position to
give OFF/AIR/AC positions. This also selects the condenser relay full time
when the AC is on. In either AIR or AC position, the fan runs in LOW speed
with the blower fan switch in OFF position.

The original blower FAN switch runs MED in LOW position and HI in HI
position.

The blower fan is only off if both the AIR switch and the FAN switch are
OFF.

I use a little electric Mercedes heater pump for hot coolant circulation
through the heater core. I hid a tiny microswitch inside the heater control
so that it only runs when the TEMP lever is in HOT position. Other wise NO
hot coolant flows through the core.

If the AIR position is selected and the TEMP lever is not in HOT, the fan
blows air that is not heated or cooled.

I have a wiring diagram that Bill Taylor helped me with. An early version of
it is here:

http://www.realbig.com/pipermail/detomaso/2012-August/145351.html

Barry

>>I have posted one solution for using a 3 speed fan on the
>POCA site at
http://www.poca.com/index.php/gallery/?g2_itemId=9225

>This scheme was worked out and implemented by Barry Seib in
>2006 with minor help from me. It adds three common relays and provides
lo/med/hi speeds for the AC and med/hi speeds
>for the heater  defroster.

>Click on the 1515x2175 resolution in the upper right corner
>and then save the jpg to your computer. You will get a really excellent
drawing
>with complete notes.

>I am sure other solutions can be implemented, but this is
>the one I know about.

>Have fun,
>SOBill  Taylor
>sobill
>at aol.com

-----Original Message-----
From: Jim Gray [mailto:grayjim at att.net]
Sent: Tuesday, August 14, 2012 2:27 PM
To: Dave Londry; B. Seib
Cc: DetomasoList
Subject: Re: [DeTomaso] Blower mystery demystified

When I installed mine, I just hooked the low speed to the unused switch at
the
bottom of the console while using the original fan switch for the medium and
high settings.  Not totally stock but stock looking.

Jim Gray

----- Original Message ----
From: Dave Londry <davel at emspace.com>
To: B. Seib <oldwheel at shaw.ca>
Cc: DetomasoList <detomaso at realbig.com>
Sent: Tue, August 14, 2012 2:18:15 PM
Subject: Re: [DeTomaso] Blower mystery demystified

Being an "all stock" guy, how did you handle the 3-speed switching?

dave
(who has only Hi at the moment)

On 14/08/2012 12:07 PM, B. Seib wrote:
> The GENAIRE blower fans like the one in most Ford era Panteras are pretty
> generic and were used in other specialty vehicles like some busses and
RVs,
> I think. I'm very happy with my new 3 speed US made motor. It fit right in
> without modifications to my original GENAIRE "made in OHIO" fans and
> housing. It blows at least twice as much air on Hi as the original. I
> suggest you get one. Not expensive either.
> The new 3 speed motor is a BM4320. I learned this from this DeTomaso list
> years ago. I didn't invent it.  Just Google BM4320.
>
> This thread has a lot of information on blower fans:
>
> http://www.realbig.com/pipermail/detomaso/2012-August/145351.html
>
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