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Old 06-28-2005, 05:00 PM   #1
RS Paul
Scooby Newbie
 
Member#: 87520
Join Date: May 2005
Default Impreza 2004-2005 headlight wiring diagrams

I've just drawn up some wiring diagrams to help me understand the
headlight system for 2004 and 2005 Imprezas. Those of you considering
adding or modifying fog lights or driving lights may find them useful.
It took me a long time to figure out what was going on even with the
factory manual. Hopefully these drawing can save someone some pain.
Wiring diagrams
I haven't produced anything new, just put together info from various
places off the internet and from the service manual.

Feel free to use them as you see fit, I only ask that no one copyright
them as I had happen with some other work. You can PM me with any
comments or corrections and I'll update the drawings.

The resolution of the drawings is not the greatest but they print pretty
well. I can provide the original drawings in Micrografx Designer 7 format
which are much clearer and are editable.

Thanks to all those that have gone before, they made things much
easier.
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Old 06-28-2005, 05:14 PM   #2
Mulder
Trust no one
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Member#: 11170
Join Date: Oct 2001
Chapter/Region: Tri-State
Location: NYC
Vehicle:
02 WRX
15 WRX/05 GTO

Default

You show the low beams going directly to ground when not in DRL mode, this is not accurate. They are switched to ground through the headlight switch.
Good work though-
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Old 06-28-2005, 06:58 PM   #3
RS Paul
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Member#: 87520
Join Date: May 2005
Default

In my service manual (2004) on page WI-135 are shown two
different grounds "REF.TO GND-02" for the headlight switch and
"REF.TO GND-03" for the daytime running light relay and the
daytime running light resistor. When the lowbeams are turned
on the daytime running light relay switches to change the ground
path for the lowbeams from going to the resistor (then to ground)
to go directly to ground.

The lighting switch grounds the daytime running light relay coil,
not the lights themselves.
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Old 06-28-2005, 07:13 PM   #4
Mulder
Trust no one
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Member#: 11170
Join Date: Oct 2001
Chapter/Region: Tri-State
Location: NYC
Vehicle:
02 WRX
15 WRX/05 GTO

Default

Ok, I see what the problem is. You are basing your diagrams on the wiring for the 04-05 which is a dual-beam system and keeps the low beams on as long as the headlight switch is on. The 02-03 is NOT the same, it is a single bulb/dual filament system that turns off the low beams when the highs are on. Hence the wiring is different.
Although you indicate that the diagrams are for 04-05 on the diagrams themselves and in the text of your thread, you also need to do so in the title. I'll fix that for you.
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Old 06-28-2005, 09:06 PM   #5
RS Paul
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Member#: 87520
Join Date: May 2005
Default

Thanks Mulder. I changed the title on my webpage. I was only guessing
about 2003 since the cars seem pretty similar. I also wondered if these
drawings would also apply to 2006s but I guess I'll have to wait to see if
they've changed things (again) or not.
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Old 05-15-2013, 08:24 PM   #6
V1P3RSRTX
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Member#: 353300
Join Date: Apr 2013
Location: Pittsburgh, Pennsylvania
Vehicle:
2004 Impreza 2.5rs
Silver

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I know this thread is slightly old but I would like to inquire as to if anyone has a schematic for the grey 4 conductor connector that is the clip connector for the DRL/LB headlight in the 04/05 Imprezas.

If you happen to know the voltage and amperage on each line also that would be quite helpful. Looking to mod an aftermarket HID Halo to take the place of the DRL's if I can.
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Old 05-15-2013, 11:41 PM   #7
Mulder
Trust no one
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Member#: 11170
Join Date: Oct 2001
Chapter/Region: Tri-State
Location: NYC
Vehicle:
02 WRX
15 WRX/05 GTO

Default

Please don't bump ancient threads.
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