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Unfortunately, the answer is : find another motor.
You apparently have a short in the armature, most likely from one
winding to ground, but possibly between two windings.
Re-winding the armature is another possibility.  I've done it
successfully, but it's a pain.
Randall
Tony Rhodes wrote:
> 
> Well, I took off the back plate of the wiper motor (TR4A) and cleaned the
> brushes.  Then I tried to turn it on with the back plate off so
> I could see what it was trying to do.  BTW, I could spin the
> motor by hand (with it off) easily.  I turned it on and
> the motor did not spin.  I tried to help it along and it was just
> seized in one position!  Immobile!  THen the brushes got very warm.
> 
> I turned it off, reassimbled completely, but it still does not work at all.
> Just sucks up about 6 amps or more.
> 
> What to do now!
> 
> -Tony
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