Heated Window Switch
Heated Back Window Switch and Light, Explorer, Aerostar1. Ground Pin 4 and connect a jumper wire between Pins 3 and 2. Connect a 12-volt test light between Pin 1 and ground.
2. Apply power to Pin 2. The test light and the ON indicator should not come on.
3. Momentarily push the right side of the rocker button to the ON position. The test light and the ON indicator should come on and stay on after the rocker button returns to the normal position.
4. The test light and the ON indicator should go off under one or more of the following conditions:
^ Left side of rocker button is moved to OFF position.
^ Approximately ten minutes have elapsed.
^ Jumper wire between Pin 3 and 2 is disconnected.