Liftgate Module (LGM)
- Defog Relay Voltage
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The scan tool displays the voltage at the rear window defogger grid.
- Rear Defog Requested
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The scan tool displays Yes/No. When the rear window defogger switch is depressed, the HVAC control module sends a class 2 message to the LGM to enable the rear window defogger. The LGM enables the rear window defogger, which the scan tool displays as Yes.