Blower motor not working?

My blower motor stopped working a few months back and I changed both the blower motor and the blower motor resistor and everything worked fine again. A couple months later it started only working when the fuse panel under the drivers side was angled at a certain direction (my fuse panel is hidden and it swings down for access) and now it's not working no matter what and the fuse isn't blown. I've been told it's because there's a short. I want to fix this myself so how would I go about doing so?
I drive a 1998 Ford Contour GL
Thank you

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