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Old 10-01-2003, 01:28 AM   #1
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Default Electrical idea

May be a bad idea, but is there any way to put or convert a normal On/Off switch to the rear window defogger, rather than the timed thing?

Along this line, where is the timer? In the switch or hidden elsewhere along the circuit?
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Old 10-01-2003, 02:27 AM   #2
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Hmmmm....not sure about yours. With my auto climate control, I'm pretty sure it'* built in to the control unit.
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Old 10-01-2003, 02:33 AM   #3
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Oh Yeah, shoulda mentioned, no ECC on mine.
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Old 10-01-2003, 03:12 AM   #4
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Default Re: Electrical idea

Quote:
Originally Posted by MOS95B
May be a bad idea, but is there any way to put or convert a normal On/Off switch to the rear window defogger, rather than the timed thing?

Along this line, where is the timer? In the switch or hidden elsewhere along the circuit?
according to the factory manual its a solid state timer.. built intot he HVAC programmer/assembly
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Old 10-01-2003, 03:15 AM   #5
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Hmmmmm, bummer. Maybe build an alternate circuit? Gotta see If my Chiltons has a wiring diagram. I hate scraping Ice, and it would be nice to be able to have the rear window defrosting when I use my remote starter.
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Old 10-01-2003, 03:20 AM   #6
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Add a relay to your remote starter to momentarily close the circuit. Just bridge the circuit to your switch. Is the rear defrost switch part of the climate control, or mounted elsewhere?
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Old 10-01-2003, 03:24 AM   #7
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It'* in the same panel, not sure how it'* wired tho.
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Old 10-01-2003, 03:26 AM   #8
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All ya gotta do......

Find your main control relay for the remote starter. Find a wire that produces 12v at least momentarily when you press START on the remote.

Take that 12v to the coil of a relay. Now open your CC box, and find the 2 wires to the rear defrost switch if you can. Parallel those two wires to the NO contacts of the relay you just added.

Voila! You just did it. Rear defrost will come on when the car starts.
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Old 10-01-2003, 03:54 AM   #9
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Sounds like a do-able plan. The only problem is, it seems my defroster is pretty weak. Seems to take almost the whole "cycle" to just remove dew. Can't wait to see what it does with ice or snow...
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Old 10-02-2003, 03:26 AM   #10
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is there any way to fix the defrost...mine only liek works on 4 bars...well then i cant see anything still and im too lazy to scrape!
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