Accy. Relay Command: The scan tool displays On/Off. The body control module will indicate if it is commanding the RAP/ACCY relay On or Off.
Rear Defog Relay Cmd.: The scan tool displays On/Off. The body control module will indicate if it is commanding the rear defog relay On or Off.
Rear Defog Switch: The scan tool displays Active/Inactive. The BCM receives an input from the HVAC control head indicating Active when the rear defog system is turned On.