Can you help us find a wiring diagram for a non-Greyhound 4103?

Our 4103, although painted as a Greyhound started revenue service in the Quaker City Bus Company fleet in Philadelphia in 1952. We have learned 4103’s delivered to companies other than Greyhound are different. If you have or know of a wiring diagram please contact the museum at 717-566-7100 X119. Please leave a message and someone will contact you. Thank You.