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Old 05-15-2019, 09:47 PM   #1
Scooby Newbie
Member#: 31204
Join Date: Dec 2002
Chapter/Region: Tri-State
Location: People Republic of New Jersey
2003 wrx wagon
Winter dirt

Question LED conversion question headlights and fogs 2004 FXT odd behavior

I recently did a conversion from halogen to LED on a 2004 FXT, everything basically went well, far less obnoxious than a lot of new cars, especially Chevy GMS pick ups and Honda Acura.

But I am having odd behavior.

Low beams, great, High beams Great.
Turn on fogs, lo beams go off and high beams come on.
I can not have low beams and fogs together.

I am thinking it may be the stock relay, and the low resistance of the LED.
Like the turn signal issue which is fixed with an electronic relay.

Do you think this might be the issue?
Anyone else experience this issue and find a fix?

Thanks for your time and thoughts in advance.
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Old 06-24-2019, 12:18 AM   #2
Scooby Newbie
Member#: 17364
Join Date: Apr 2002
Location: Fallbrook, CA
2002 WRX wagon
Sedona Red Pearl

Default Same issue 2002 bugeye

I'm having the exact same issue on my 2002 bugeye WRX. Would love to see the solution, if anyone knows.
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Old 06-25-2019, 01:20 PM   #3
Scooby Specialist
Member#: 13530
Join Date: Dec 2001
Chapter/Region: NWIC
Location: Cascadia
EA63 , EA81T, EJ20G,


Put the halogen bulbs back in and buy auxiliary driving lamps if the stockers aren't bright enough. Or do a true retrofit, or buy aftermarket LED-equipped lamps. This isn't 2010 anymore.
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Old 07-02-2019, 08:57 AM   #4
Scooby Newbie
Member#: 62941
Join Date: May 2004
Chapter/Region: MWSOC
Location: @brgperformance
2004 #LesboRacer


Most likely the kit is wired incorrectly due to the subaru headlight system, in these years at least, being a switched ground system, not a switched power system.

If this is not taken into account diodes may be in the wrong place, pointing the wrong direction, not present... etc etc.

Even with a retrofit system this needs to be accounted for.
Barge is offline   Reply With Quote

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