My 1985 K100 RT was running fine today before I changed the coolant. During this process I disconnected wires from the negative terminal of the battery, removed the necessary body panels, moved the fuel tank over without disconnecting the fuel hose. After connecting the battery wires, I had no power to the main switch. Further diagnosis showed that the problem was no ground connection as a jumper from the battery negative terminal to the frame restored power. The problem is that my Clymer manual electrical diagrem shows the battery negative connected directly to ground whereas my K100 has two wires (1 red, 1 brown) from the battery negative terminal disappearing into a wiring harness on the frame. Anyone have a suggestion as to where I should look for the problem?