Well, my personal feeling is that the only thing fabric softener does is gum up washing machines, and that it has very little value in cleaning clothes, but since a lot of folks want to use it I would diagnose your problem as a faulty cold water valve assembly.

First check to see that there are no obstructions in the distribution assembly, and if so check to see that voltage is getting to each of the cold water valves solenoids, particularly valve number two. If that one is getting power but will not open then try replacing the cold water valve assembly.

Here is a service manual which will show you how to get into it and the method by which fabric softener is dispensed.

http://www.servicematters.com/m...ibrary/docs/16025909.pdf