If the wires fell out the harness will likely need to be replaced.
https://www.google.com/search?q=660+wiring+harness&client=firefox-a&hs=wJE&rls=org.mozilla:en-US:official&channel=sb&source=lnms&tbm=isch&sa=X&ei=fR1iVLPfItawyAS0-IE4&ved=0CAkQ_AUoAg&biw=1366&bih=657#rls=org.mozilla:en-US:official&channel=sb&tbm=isch&q=icecap+660+wiring+harness&imgdii=_