blower motor not working

hey, my friend has a 98 2500 12v blower motor isn't working used a test light and has no power at blower, none at the resistor either. fuse under hood all good same as relay driver side fuse panel blower motor fuse is good also i also check in back of controle knobs and only have one live and it's for the lights..so i have no clue, would it be a bad wire going to relay??
thanks