I tried to check for the diagram on the Frigidaire web site and found none, Sears Canada is not online. So it might be best to call a company like APWagner as thye have Sears microfishe and can help with parts and such.
Sears Refrigerator Parts

now to find the diode
On many of the newer ones it is right beside the fill valves. Looks like a black pencil slug.

jeff.