Control Switch

With switch in "NORM" position, continuity should exist between two terminals. In "ON" position, there should be continuity between all terminals. In "OFF" position, there should be no continuity.

Fig 1: Heated Rear Window Wiring Diagram (Mustang, Pinto, Bobcat, Granada, Monarch & Versailles)

Courtesy of FORD MOTOR CO.

Fig 2: Ford Motor Co. Heated Rear Window Latching Relay And Relay Circuit Test Connections

Courtesy of FORD MOTOR CO.