All of a sudden sitting at a red light my truck started to buck and then just died....when I went to restart the clutch went right to the floor...I checked and there is fluid in the cylinder, but I added a little more, it made little to no difference. I was able to drive it home slowly (couldn't get it past third gear). When we got underneath it there is a wire that is broken....not sure what it even goes to...does anyone have access to diagrams for the cluch assembly and the clutch master cylinder? we are trying to figure out if we need to replace the master cylinder or if this mystery wire is the case of the issue. Thanks