Samsung WF448AAP washer not draining

I have a samsung washer modle # wf448aap/xaa and the drain pump stopped, I replaced the drain pump and still not working. I am not getting power to the pump,so I replaced the main pc board and the same problem. I tried running a cycle with the water off and the machine still apart to see if the drain pump would start no luck, the pump runs when I wire it up to 110v. I tried finding the wire that supplys the drain pump with a multi meter no luck. I need to know which plug and relay on the main pc board supplys power to the drain pump, and if anything else in line can stop the power to the pump    thanks