Answer Hi Scott. Great question. You need to get the wiring diagram from behind the timer area. Then it will show you the contacts to test. You need to be careful as this is a live circuit. Is the timer sounding like a rattling part . If so it is common and needs replaced. It is part # WPW10185972. Thank You. Read More... Answered by AppliancePartsPros.com | Thursday, December 29, 2011