samsung pump wiring problem

model number WA85N6750B. purchased new. My pump has 2 yellow wires going to the pump following wires up I can get to a connection where 1 yellow wire changes to black. Which wire is active? on the pump connectors there are no markings for active and neutral, which terminal is active?

thank you that's a big help. Usually wires are brown and blue, I think this pump was replaced before we bought our washer looking at the amount of black electrical tape placed over the wires in places. Do you know the active terminal on the pump or doesn't it matter which terminal you connect the wires to? terminals are not marked.