I have a similar issue with my Lofranís windlass
. It is currently wired with up only and manual down. There are two wires to the windlass and I have been trying to figure out if I can simply reverse their polarity to reverse the windlass so I can have power both up and down. As I understand it, permanent magnet or universal motors as they are also called, can be reversed simply by reversing polarity. You can tell if you have this type of motor (unlikely from what I have read) by putting a piece of iron or mild steel
to the end of the armature and see if there is any magnetic attraction when the motor is not running.
If not, then their will be a separate field winding that sends a small current to the stator ring to create the necessary initial magnetic field to start the motor. It can be wired either in series or parallel to the main armature winding. If in series, then reversing the polarity of the wires wonít reverse the motor and could damage it. It can only be reversed by rewiring the field coil so that it is parrelel to the armature and then using a third wire that reverses the current to the field coil only. Most reversing windlasses have three, not two, witres to them for this reason.
Or at least that is what I think I have learned so far😬