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Thread: Wiring Diagram 2004 WRX

  1. #1
    Variable Bitrate Redian's Avatar
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    Wiring Diagram 2004 WRX

    Alright, its 12:15 AM and so, i may have forgotten key elements to my car (who needs a computer for a CarPC ^^) but yeah, i think i got everything...

    Please critique it. And tell me if i should replace anything and if so, with what - it is my first install, and will be appricated.


    Edit: Also, What type of Fuse and Gauge Wire should i use? i havent done the math for the Fuse (its 12:30am now) and im thinking that 10 Gauge should be more than enough... am i correct?
    Edit2: I forgot GPS, not very important (just a USB Periph) but yeah, thats in there too. it can be seen here...
    Edit3: Also, i added a USB Connection to the lilliput from the mobo no point in updating the picture, makes no difference... Same w/ the RF Keyboard, hub connected via USB - once again... no reason to make a new thread or post and update
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    2004 Impreza WRX CarPC Install

    I am willing to host any legal downloads that may benefit the CarPC community - PM for info

    "When you go 0-60 in 4.5 seconds, you don't need a made up character called fast. Thats what makes a Subaru, a Subaru."

    DG4L

  2. #2
    Variable Bitrate Redian's Avatar
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    bumppp.
    2004 Impreza WRX CarPC Install

    I am willing to host any legal downloads that may benefit the CarPC community - PM for info

    "When you go 0-60 in 4.5 seconds, you don't need a made up character called fast. Thats what makes a Subaru, a Subaru."

    DG4L

  3. #3
    Variable Bitrate Redian's Avatar
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    Ok, since no one responded, ill just post another more detailed diagram on how the power being supplied will be laid out


    i KNOW i have done something wrong in it... so, help me figure it out...

    -Is a 10 gauge wire overkill? it goes to the block which divides (and adds another fuse to each of the new wires) to a 12 gauge wire, to the opus, and another 10 gauge to the amp. (which then has two fuses inside of that)

    the one thing i dont want is a fire (i.e. wire shorting, thus the fuses), and to kill the amp or opus by providing too much power, is that possible? or would the amp and opus be able to regulate the flux and changes of amps/voltage (at least until the fuses blow)

    Also, for my amp (see diagram for model), what would you suggest for the gauge of the wire, i looked in the manual (pdf one, havent bought the amp yet) but couldnt find any recommendations. although i could figure it out myself, i want to be assured 10gauge and 12 gauge is alright.
    Attached Images Attached Images  
    2004 Impreza WRX CarPC Install

    I am willing to host any legal downloads that may benefit the CarPC community - PM for info

    "When you go 0-60 in 4.5 seconds, you don't need a made up character called fast. Thats what makes a Subaru, a Subaru."

    DG4L

  4. #4
    Variable Bitrate Redian's Avatar
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    i expect posts when i return from sleeping :P
    2004 Impreza WRX CarPC Install

    I am willing to host any legal downloads that may benefit the CarPC community - PM for info

    "When you go 0-60 in 4.5 seconds, you don't need a made up character called fast. Thats what makes a Subaru, a Subaru."

    DG4L

  5. #5
    Maximum Bitrate Sidewalksalvage's Avatar
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    Okay checked it all over. Actually it looks pretty good. But there are a few things i suggest. First off, dont use a ground straight from the battery, not only is it unneccessary but also can cause terrible interference in the video and sound output of the pc (from whats called a ground loop) rather find a nice clean bolt (un painted), One close to the Opus and the other close to the amp. Then ground a wire there and ground the units.
    As for the fuse and gauge. The 10 should be fine for the amp and 12 should be plenty for the opus. I have an 8 straight from the battery that breaks down to 10 for my amps and what was my pc. for more info and a nice chart check out this page http://www.crutchfieldadvisor.com/S-...uge_chart.html besides this chart ive found that crutchfield advisor has lots of good info.
    As for the fuse, basically you only need one off the battery. Usually the amp will have its own and i believe the opus has its own as well. The fuse for each should be no more than the maximum output for the opus and the max for the amp. You can add a second just before each if you feel u need the extra protection or their isnt any in the unit itself.
    The main fuse off the battery should be not much more than the addition of all the components on the line. So if the opus pulls 20A and the amp pulls 20A as well, the main should be 40A. Dont go less or it will constantly blow with both on. But dont go to high or it will not protect. Good luck with your project, everything else looks good so far.
    Brown 2010

  6. #6
    Maximum Bitrate Sidewalksalvage's Avatar
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    Oh now that im looking at the second diagram i noticed that you have more fuse info i missed. The main 30A fuse WILL NOT BE ENOUGH..it will blow once the amp is turned on. The amp requires 2 30A fuses and therefore pulls 60A and the 20A will probably be plenty for the opus (my M1 had a 10A and outputed 90W) So your main should be 80A. Hope this helps

    Also, your ground and power wires in and out of one unit should be the same gauge.
    Brown 2010

  7. #7
    Variable Bitrate Redian's Avatar
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    Quote Originally Posted by Sidewalksalvage
    dont use a ground straight from the battery, not only is it unneccessary but also can cause terrible interference in the video and sound output of the pc (from whats called a ground loop) rather find a nice clean bolt (un painted), One close to the Opus and the other close to the amp. Then ground a wire there and ground the units.
    the ground distro block would not be going back to the terminal. i was just showing that, most likely, it would be connected in the back of the car next to the amp and PC.

    Quote Originally Posted by Sidewalksalvage
    As for the fuse and gauge. The 10 should be fine for the amp and 12 should be plenty for the opus. I have an 8 straight from the battery that breaks down to 10 for my amps and what was my pc.
    yeah, that diagram is a little outdated, i made the battery and ground wires to 8 gauge, and my main power fuse will be a maxi 60/80Amp, for where i am planning to put the fuse holder, ~8 inches from the battery, that then goes to the distro block, where the 12 and 8 gauges are fused w/ ato fuses inside the distro block (still 20amp for the 12 / 20amp for the 10


    Quote Originally Posted by Sidewalksalvage
    for more info and a nice chart check out this page http://www.crutchfieldadvisor.com/S-...uge_chart.html besides this chart ive found that crutchfield advisor has lots of good info.
    thanks for the link, along with BCAE1.com it is very informative.

    Quote Originally Posted by Sidewalksalvage
    As for the fuse, basically you only need one off the battery. Usually the amp will have its own and i believe the opus has its own as well. The fuse for each should be no more than the maximum output for the opus and the max for the amp. You can add a second just before each if you feel u need the extra protection or their isnt any in the unit itself.
    The main fuse off the battery should be not much more than the addition of all the components on the line. So if the opus pulls 20A and the amp pulls 20A as well, the main should be 40A. Dont go less or it will constantly blow with both on. But dont go to high or it will not protect. Good luck with your project, everything else looks good so far.
    thanks for that info, ill be sure to double check the amps they pull and ifgure out what the main fuse should be. thanks for your help, ill post new diagrams soon

    edit 1: grammer
    2004 Impreza WRX CarPC Install

    I am willing to host any legal downloads that may benefit the CarPC community - PM for info

    "When you go 0-60 in 4.5 seconds, you don't need a made up character called fast. Thats what makes a Subaru, a Subaru."

    DG4L

  8. #8
    Variable Bitrate Redian's Avatar
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    Ok, here are the new Diagrams (pretty good for MSPaint ^^)



    2004 Impreza WRX CarPC Install

    I am willing to host any legal downloads that may benefit the CarPC community - PM for info

    "When you go 0-60 in 4.5 seconds, you don't need a made up character called fast. Thats what makes a Subaru, a Subaru."

    DG4L

  9. #9
    Maximum Bitrate Sidewalksalvage's Avatar
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    Looks much better. I still wouldnt use a distribution block for the ground. It will create feeback and interference. Instead Ground each one at its own bolt.

    Otherwise looks good.
    Brown 2010

  10. #10
    FLAC Jahntassa's Avatar
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    I'm curious how using a distro will cause feedback and interference? Most of my experience says that using multiple grounding points will cause hellish groundloops, buzz, and other noises.

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