Customer Questions and Answers for Refrigerator Defrost Timer by Whirlpool

D Curtis, the timer would be wired with the black wire jumper going to terminal 1 along with the white wire. The blue wire should go to terminal 3, yellow wire to terminal 2, and the orange wire to terminal 4. It is possible that a wire has come loose as the compressor receives voltage directly from the temperature control rather than the defrost timer.