[DeTomaso] Heater blower motor (3 speed specifically)

[Tomas Gunnarsson]

I have a question: how does the three speed motor act when more than one winding is powered? The stock motor with its series resistor doesn't care whether you switch off the low speed when you go to high or not. I have in the past had issues with mating a two winding, two speed wiper motor to a switch that didn't cut low when it went to high. This caused smoke emission... :-)

Tomas

----- Original Message ----- 
From: <JJD1010 at aol.com>
To: <detomaso at realbig.com>
Sent: Tuesday, July 14, 2009 2:23 AM
Subject: Re: [DeTomaso] Heater blower motor


> 
> In a message dated 7/13/2009 10:44:24 A.M. Central Daylight Time,  
> MikeLDrew at aol.com writes:
> 
> 
> The new  fans are three-speed units, with the speed controlled from within 
> the fan  itself.   They have four wires--a ground, and three individual 
> power  
> wires, each of which controls a different speed.   You get to  choose which 
> two of the three speeds you want (since your stock switch  will only 
> support 
> two speeds, and 'off'.   Once you've done  that, it then becomes a very 
> straightforward matter to wire the fan to the  switch.
> 
> 
> 
> .
> 
> Actually with a little creative wiring using relays and the unused  switch 
> on L cars, you can get it to work as a 3 speed. It's an interesting logic  
> problem but it actually works well and looks absolutely stock.
> 
> Jeff
> 6559
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