You could try contacting
http://www.sodamachinemanuals.com/vendo.htmlThey list a parts/service manual for a 132. Although the service section is pretty useless, the parts manuals I have for my vedo's(all two of em) have wiring diagrams and exploded view's of the machine I find handy.
You can also try
http://www.vendoco.com/Documents.aspx?ID=14They have documents for some older vendo machines. You might be able to find a wiring diagram for a similar machine.