Answer Hello Craig. The wiring diagram shows the blk. (common) is the negative post (if marked). The SB (silver/ w/ blue stripe) is the positive (if marked). If the terminal spades are different sizes, then match them with the pump terminals. In this instance the motor will run either way but you can also follow the common blk. wire that is hooked on the drain pump and follow where the blk. wire should be hooked to the recirculation pump. The wiring diagram did not supply with the wire color legend so I hope this is helpful. Please let us know if this served you well. Thank you. Read More... Answered by AppliancePartsPros.com | Friday, December 23, 2011