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Headunit dims with accessories yet wiring is fine


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#1 VippiN

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Posted 28 December 2011 - 04:05 PM

Edit - Thanks for the help

Edited by VippiN, 28 December 2011 - 08:22 PM.


#2 peaandham

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Posted 28 December 2011 - 05:06 PM

What car is it in bud?

Perhaps its a factory fault with the car, maybe a google search with some keywords including "dimming" or "illumination" and the model/make of the car?

Edited by peaandham, 28 December 2011 - 05:07 PM.

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#3 VippiN

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Posted 28 December 2011 - 06:00 PM

Hi mate, Googled for hours no dice, friends with same car all works fine. Car is a 2002 Impreza.

Just randomly tried hooking it up to the interior clock's illum wire, same drama.

#4 Frankston Car Audio

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Posted 28 December 2011 - 07:46 PM

Subaru's have two illumination wires.

IIRC the wire you need is a light green/yellow?.. it is normally located in the factory headunit connector, in the row below the wire you have connected to.
Don't rely 100% on my wire colour above, as I am doing this from memory!

... and please don't use a test light in this vehicle (unless it is a computer safe type.) to find the second illumination wire.. Only a multimeter should be used in most modern vehicles. as the current supply from the ECU that controls most functions, can be damaged by the excessive current draw from a light type tester.

HTH :)
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#5 VippiN

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Posted 28 December 2011 - 08:20 PM

Yellow/green is 12 volt acc.

Problem found and fixed.. For some reason my +illum was giving off 4 volts on acc.. So wired straight from headlight stalk = working.

Thanks for the help either way :good:

Edited by VippiN, 28 December 2011 - 08:30 PM.


#6 ubernoob

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Posted 28 December 2011 - 08:45 PM

Did you originally use the wire that is after the dash lights dimmer?
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