Having a look on TIS and I would also check fuse 17 in the Instrument Panel Fuses.
Here's a Schematic for the above.
![[Image: Power%20Ground%20Controls%20and%20Subsys...rences.jpg]](http://i124.photobucket.com/albums/p39/rustywhite2007/VXOC%20TECH%20DATA/Rear%20Demister/Power%20Ground%20Controls%20and%20Subsystem%20References.jpg)
Also fuse 18 in the engine compartment there is also a relay K04.
Here's the Demister Schematics for the above.
![[Image: Defogger%20Schematics.jpg]](http://i124.photobucket.com/albums/p39/rustywhite2007/VXOC%20TECH%20DATA/Rear%20Demister/Defogger%20Schematics.jpg)
The Demister should work once the engine is started.
Also not all cars will have all the fuses relays etc.
Astra-J 2.0 CDTI S/S
Retrofitted AFL, TPMS, Navi950, BT, DAB, Rear Camera, Infinity sound system, Towbar, Flexfloor & more.
I can do programming and retrofits using genuine GM MDI and Dealer software.

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