Intrepid V6-3.2L VIN J (1998)
Heated Glass Control Module: Description and Operation
SYSTEM OPERATION
The Rear Window Defogger electrical system involves the operation of the Heater-A/C or ATC Control Head, the Body Control Module (BCM),
and the rear Window Defogger Relay and wiring. The passenger can push the Rear Widow Defogger button on the Heater-A/C or ATC Control to
defog the rear glass. The system will only operate when the ignition switch is in the run position. Once the Rear Widow Defogger button is pushed.
the button indicator will light and the system will operate for a period of time and then automatically' turn off. Refer to the owner's manual for
operation of the A/C-Heater or ATC control.
The A/C-Heater or the ATC control sends a signal to the BCM, which indicates to the BCM that the operator wants the rear window grid to heat.
Refer to the A/C-Heater or ATC Control section of the service manual for details on how these modules interact. An output wire from the BCM
connects to the coil of the rear window defogger relay. The other side of the coil is connected to a fuse. The BCM turns on the relay by connecting
the output line of the BCM to vehicle ground. The relay contacts will then close supplying vehicle power to the rear window defogger grid.
