2000 379 hvac blower problems

on my 2000 Pete the ac blower won't work I changed the blower it self and didn't work, I changed the resignator to the blower and still didn't work today I changed the fan speed switch thinking surely this is it and the #### thing still won't work the ac conprsor will turn on with the switch but the fan won't run any ideas??

 

No it's not running at all changed relay too just seems like it dnt have any power!!

 

I didn't check the ground the relay I changed before it stopped working before it only worked in high and would cut on and off cause it would make the relay hot where would the ground be at

 

I did that but it seems to be very weak power going to it I did it with Testlight of course

 

I figured it changed the fuse and still didn't work so I called a buddy of mine and he told me to get behind the fuse block and check the wires and clean back there cause a lot of dirt and crap get back there and sure enough had a bad sore so just fixed it and it worked!!! Thanks guys for y'all help!!