electrical schematics for a 1981 Hallmark mobile home

by Mary
(Moravia, NY)

Where can I find an electrical schematic diagram for our 1981 Hallmark mobile home? We have a hum in our ceiling/wall in one of the bedrooms and the lights in the kitchen and the master bedroom won't work. When we shut the breaker off the humming stops. I think the hum is from wires arcing in our wall/ ceiling. I don't want to tear down the walls and ceiling to fix it unless I know what the best solution to our problem is. Can you help?