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rear window defogger

 
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procyon  



Joined: 09 Sep 2015
Posts: 57
Location: Peers Alberta Canada

PostPosted: Wed Sep 19, 2018 12:15 am    Post subject: rear window defogger Reply with quote

Anybody know where the physical electrical ground location is for the rear window defogger? The electrical diagrams say it is on current track #9 but does not give a ground location.
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1981 924 N/A (Now the parts car)
1980 924 N/A ( 5 bolt discs and better paint)
2007 Subaru Forester
2007 Toyota Camry
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Ozzie  



Joined: 12 Mar 2005
Posts: 4414
Location: Townsville, Qld. Australia

PostPosted: Wed Sep 19, 2018 7:10 am    Post subject: Reply with quote

it is grounded through the hatch strut
it must have metal ends
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
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procyon  



Joined: 09 Sep 2015
Posts: 57
Location: Peers Alberta Canada

PostPosted: Wed Sep 19, 2018 11:33 am    Post subject: Reply with quote

Yes I understand that part, there are two wires. One supplies 12V and the other must go to ground somewhere. Neither of the two wires is connected to ground.
Where is the ground point for current track #9 located?
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1981 924 N/A (Now the parts car)
1980 924 N/A ( 5 bolt discs and better paint)
2007 Subaru Forester
2007 Toyota Camry
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Ozzie  



Joined: 12 Mar 2005
Posts: 4414
Location: Townsville, Qld. Australia

PostPosted: Thu Sep 20, 2018 8:40 am    Post subject: Reply with quote

One wire is a switched wire for interior light. The strut is the earth.

One side has plastic end (12v for defogger) is connected to strut and supplies power to defog. The other end is the earthing strut (#9)and also has a sliding switch which turns on the interior light when hatch is raised.

The defogger earths through the strut to the body. There is no earth wire #9
The wire on that end is for the light (#34?)
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance
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procyon  



Joined: 09 Sep 2015
Posts: 57
Location: Peers Alberta Canada

PostPosted: Thu Sep 20, 2018 11:33 pm    Post subject: Reply with quote

Thanks for the help. It makes sense now and things are working as they should. Raising the rear haych now turns on the light in the back and the cabin light in the passenher compartment. That was unexpected.
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1981 924 N/A (Now the parts car)
1980 924 N/A ( 5 bolt discs and better paint)
2007 Subaru Forester
2007 Toyota Camry
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