Pump Will Not Turn On

Last year our LG front load washer stopped working. I wouldn’t turn on. This year as I am trying to fix it. I have replaced the following parts: (Pump Motor Assembly #4681EA2001D)(Washer Filter Assembly # 6201EC1006L) Sears Part. It now turns on, fills with the water, and does spin but the drain pump will not turn on. I have checked all the hoses and nothing is clogging them. I can’t find out what is causing the pump from turning on. Do you have any suggestions as to why the pump is not turning on and the water doesn’t drain from the washing machine? Any advice will be helpful.