The system uses a applied to the inner surface of the rear glass. When current passes through these lines, they generate heat to clear fog or frost. Operating Voltage: 12V DC.

The energized relay closes its internal switch, allowing high-current power to flow from Fuse Ef7 (30A) directly to the rear window grid.

The grid is grounded on the opposite side of the window (usually the left or right pillar). 🔍 Troubleshooting & Common Issues If your defogger is not working, check these in order:

When you press the defogger button, a signal is sent to the relay coil. In most Lanos models, this is managed by a timer (often integrated into the relay or ETACS module) that keeps the system on for ~10–15 minutes.

Parallel (each horizontal line acts as a separate branch).