Heated Glass Element: Testing and Inspection

1. Using a bright lamp inside the vehicle, visually inspect the wire grid from the outside. A broken grid conductor line will appear as a brown spot.
2. Run the engine at idle. Set the rear window defroster switch and lights to ON. The indicator light should illuminate.
3. Working inside the vehicle with a multimeter, contact the broad red-brown strips on the rear window positive lead to battery side and negative lead to ground side. The meter should read 10-13 volts. A lower voltage reading indicates a loose rear window defroster ground wire connection at the rear window defroster ground wire screw.
4. Contact a ground point with the negative lead of the meter. The voltage reading should not change.
5. With the negative lead of the meter grounded, touch each line of the rear window defroster grid at its midpoint with the positive lead. A reading of approximately six volts indicates that the line is OK. A reading of zero volts indicates that the line is broken between the midpoint and the battery side of the grid line. A reading of 12 volts indicates that the circuit is broken between the midpoint of the grid line and ground.
6. Repair the rear window defroster grid.