With the wires reversed on the motor in my '72 GT the motor reverses.
While it appears to be the OEM motor, perhaps it's not. Maybe they have
different motors. I dunno.
Bob
On Wed, 19 Jul 2000 17:35:16 -0500 Barney Gaylord <barneymg@ntsource.com>
writes:
> At 03:03 PM 7/19/2000 -0400, someone wrote:
> >....
> > Before you go to the effort to replace the fan, check that its
> wires are
> correctly connected. The motor is DC, so will run fine in either
> direction.
> The fan works better in one direction. ....
>
> Well, I've heard this at least a hundred times now, and I can't
> stand it
> any more. My MGA heater motor is a series wound DC motor and runs
> in the
> same direction regardless of the input polarity. When I procured a
> replacement motor that ran in the opposite direction I had to open
> the case
> and swap the wires on the field coils to make it run the other way.
> I just
> went and checked one a minute ago just to be sure I wasn't suddenly
> in a
> totally different universe, and it definitely does NOT change
> direction of
> rotation when the input power polarity is switched, but continues to
> run in
> the same direction.
>
> I was (and still am) under the imperssion that ALL standard MG
> heater
> motors are series wound DC motors. To change rotational direction
> with a
> change of polarity would require having permanent magnets in there
> somewhere. Would someone please explain to me what kind of heater
> motor
> they have in their MG that would reverse direction just by reversing
> the
> current?
>
> BarneyGaylord
> 1958 MGA with an attitude
> http://www.ntsource.com/~barneymg
>
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