Wayne Parham Messages: 18787 Registered: January 2001
Illuminati (33rd Degree)
The way you would normally find out that kind of information is by looking at the schematic. Trouble is, Mongomery Ward equipment schematics are notoriously hard to find because they bought chassis from OEMs like RCA. Sometimes you can find the OEM schematic, but that's usually done by visual comparison, and that means you have to go through thousands of schematics to find one with a layout that matches yours.
Chance are, the transformer secondaries all work except for one winding. Either that or the primary is what actually opened. Have you started checking with a meter to see which windings are open? The more you know, the closer you'll be to finding a match.