I have a Santa Fe F3 ABA set, vintage 1991(reference 71-8102-252) in which the sounds no longer function. The dummy unit 1-1802 (same as Great Northern 1-8106) contains the Railsounds electronics. When powered up the headlight lights and I can hear a faint hum from the speaker. Turns out I have a broken wire. A green wire runs back from the "Sound Board" (610-8808-040) to a yellow wire nut and then on towards the vicinity of the "Sound Amp Board" (610-8007-110) where apparently it has broken off. I don't see an obvious point where it should be connected and I haven't been able to find a wiring diagram or schematic for this unit. Can anyone help me make the proper connection???
Thanks,