Left Power Mirror Does Not Operate In Up/Down Positions

Disconnect left power mirror connector. Connect test light between left power mirror harness terminal "C" (Yellow wire) and ground. Move power mirror switch to up position. If test light illuminates, go to next step. If test light does not illuminate, check for open in Yellow wire between left power mirror and power mirror switch. If circuit is okay, replace power mirror switch.
Connect test light between left power mirror harness terminal "D" (Light Green wire) and ground. Move power mirror switch to down position. If test light illuminates, replace left power mirror. If test light does not illuminate, check for open in Light Green wire between left power mirror and power mirror switch. If circuit is okay, replace power mirror switch.