I just started with this quite old game. I have a rather good working city and wanted to export garbage to the neighbouring city. This worked fine. Then I wanted to import Electricity from the neighbouring city. This didn't work at all.
Here's what I did: Build a road to the edge. Build a power line to the edge. Go to the other city, built three power plants and give them full money and build garbage places, connect everything with streets and lines. Go back to the main city. I can export garbage. Fine. But I can not import Power. Not fine.
My city went to ruin because I had no money left and I destroyed the power plants because I thought that importing only works when I have no power plants.
Can someone please give me a detailed explanation on how to trade electricity between cities?