Re: {Chrysler 300} 1964 blower fan switch...

[John Grady <jkg@xxxxxxxxxxxxxxxxx>]

it is probably a tapped field shunt motor — no resistors . Don’t know 64 but 60 is brown and green wires . That way no heat to lose. 

AC different than non AC obviously . too . AC has that pull switch in 60 , i think that is three speed but I never got into AC blowers 

Can’t tap a permanent magnet motor , no wound field . Have to add resistors , big ones ? 100-150 watt , or get Chinese PWM variable drive for 12 v motor . Motor probably 40 A that is 500 W  almost 2/3 Hp 

I’d leave it alone … really 

I have noticed that air is colder on a lower fan , makes sense , you can only pull so many btu out . Cannot cool hi air flow compared to lower flows with same AC refrigerant flow . 

j

Sent from my iPhone

On Apr 17, 2024, at 4:17 PM, 'James Douglas' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:



My switch seems to be a THREE SPEED switch, yet the wiring diagrams and the owner’s manual just seems to show a low and a high.

 

Can anyone provide any clarity on this?

 

Reason I ask is I am wondering if the resistors to change the fan speed are in the switch (I did not notice them), external someplace, or built into the motor.

 

I am looking into having a permanent magnet motor built to get more RPM and air through the system. But first I need to get a firm grip on how the existing system works.

 

Thanks, James

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