I have cleaned the contacts, put in fresh batteries, and cleaned the wheels on these diesels. These are O gauge postwar diesels. I have a ZW transformer. The horns make a buzzing sound. It appears the contacts and/or relays are not cooperating with each other.
There is a Lionel repair place an hour away from me. Does anyone know of anyone in the Central New York State area that might be able to help me, or can give advice on this issue?