2245 Lionel Texas Special 1954 Horizontal Motor Wiring

Olsen's kindly hosts the service documents that have the wiring diagram you are seeking:

Additional pages available here: http://www.olsenstoy.com/2245-3.htm

P.S. Horizontal or vertical; it doesn't matter - a brush is a brush and a field is a field

So it doesn't matter between the two? I have that diagram, and it calls out that it doesn't discuss the horizontal models on it. That's what has me confused.

Both the horizontal and vertical motors are wired the same, as they are electrically identical.

Larry

Correct, from an electronic wiring perspective, it doesn't matter - a brush is a brush, a field is a field.

For other details discussed elsewhere in the document such as part numbers and part lists and such, there are definite distinct differences between vertical and horizontal motors.

As Bmoran and Larry have said, there is no difference electrically between the horizontal and vertical motors' wiring.  Here's a link to Olsen's service documents showing the horizontal motor wiring for the SF dual, horizontal motored 2300 series F-3's:

http://pictures.olsenstoy.com/cd/locos/f3-1.pdf

An important consideration not yet mentioned is that these are series wound motors.  The field and armature are always in series.  The E-unit changes the relationship between the armature and field but they are still in series.  Typically with Lionel the field is grounded (with Marx motors the opposite is true) and which brush connects to the other side of the field is changed by the E-unit to change direction.