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Old 03-11-2009, 11:19 PM   #1
The Scooby
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Location: Seattle, Wa
Default GD wiring in GF headlight question

ok so far i have swapped a 03 WRX full drivetrain into my 99 Impreza OBS, i have got it running with a 3inch exhaust, APS BOV and intake, Cobb stage 3 front brake kit, V7 STi struts/springs, Cobb fsb and adjustable RSB.

anyways im down to the finishing stages on the lighting system wiring. my question, im converting from the GD 9007 headlights to the GF H4, which if i remember right has one constant ground and 2 different power for high/low. the 9007 has constant power but switches grounds and powers for low/high beam switch. my question is how would i wire this to work with the H4 plug.

thus far ive been able to get everything right and it runs but for some reason this is giving me some trouble trying to figure out how to wire these.

Thanks
Shean

here is the car in question.

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Old 03-12-2009, 02:53 PM   #2
jdubya301
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03 suzuki sv650s

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i dont know for sure, but i think you can wire up an h4 just like the 9007.

most vehicles use a common ground then switched high and lows on an h4 harness.

subaru uses ground switching, so my guess i that you can take the existing common positive and place that on the h4 ground pin , then do ground for high and ground for low.

basically just do a big switcharoo on the H4 plug.
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Old 03-12-2009, 05:31 PM   #3
The Scooby
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cool thanks for the help.

ill give it a try with some jumper wires.
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