Start at this link, and from there you can find a similar model...
the schematics are in the owners manual (not sure if they have
the detail you are after, but still a good start)
http://www.murray.com/products/listing2.asp?DeptID=110000&type=support
On that page click the "Parts Look Up" box.
On the page in the "Select OEM" click Murray then enter your model number. It will find 2 mowers a mid engine and a rear engine. Select yours, then click the "Illistrated Parts List" folder. There select "Electrical System"
That will have all the information you need in pictorial form.
Rick
April 2006
I can answer this question...
complete wiring diagram for murry riding mower-38" cut?