Reversing Moroso Window Motors

[dardal@xxxxxxxxxxxxxxx]

I recall working on my 68's windows.  There are only 2 wires, and indeed the 
polarity reverses when the direction of motion is reversed.  In other words, 
thee are only 2 wires to the motor, and the switch reverses polarity.  The 72 
may be different...
D^2

my '64 Merc and '76 
> Eldorado that the window lift motors have two wires, one for up and one
> for 
> down. The negative ground is accomplished by a ground strap at the base
> of 
> the motor. When positive voltage is applied to one of the wires, the
> motor 
> is activated. When positive voltage is applied to the other wire, the
> motor 
> runs the opposite direction.
>