Blower motor not blowing

HI what you need is the AC BLOWER MOTOR RESISTOR W/ AUTO TEMP CONTROL module, They have several on ebaay. what happens is these are usually in the AC air stream to keep them cool otherwise they overheat and crack so when your driving and hit a bump the blower stops, hit another bump and it might come back on.

i have a 1978 mercury grand marquis blower motor doesn't blow. i put a wire direct and blower works. I went to the switch no power anywhere went to the relay no power. i went to the fuse box all fuses are good . ???? what am i missing