I had a 115 shop manual, but I let it go when I sold the car. The shop manual has bits and pieces of the wiring diagram in each section, but does not really have the whole enchilada. I never bought the wiring diagram, but I know that
www.tmcpubl.com used to have it. There are several variatiions of it, so you would need the vin number when ordering it.
edit... BTW, RLeo (Randy in Austin) has my old manual now. He might be willing to scan parts of it for you.