Used power lead harness for the 1970 XR7 rear defog option. This harness connects to the accessory plug out of the fuse block, the defog switch harness, and the blower motor wiring harness. Please see your wiring schematic for clarification. There are a total of three wiring segments or harnesses for the 1970 XR7 with rear defog. The power lead harness, switch panel harness, and the long wired one that goes to the blower motor.
Complete Ford part number unknown, but the basic number is 18C496.