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Thread: Powering a M4 ATX with CD player wire harness?

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    Constant Bitrate knownchild's Avatar
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    Powering a M4 ATX with CD player wire harness?

    Is it possible to use the power cable that runs through your wire harness that powers your cd player to power your carputer?
    Never accept STOCK equipment.

  2. #2
    Maximum Bitrate kegobeer's Avatar
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    It should work, as long as you have a 12V and ground wire in there (and ignition if you need it for the p/s) and the fuse is big enough to handle the amp requirements. Others may chime in with more info for you.

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    Self proclaimed spoon feeder TruckinMP3's Avatar
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    Quote Originally Posted by knownchild View Post
    Is it possible to use the power cable that runs through your wire harness that powers your cd player to power your carputer?
    Depends on the wire size in the harness, how much of a draw is already on the wire and what draw you are going to add.

    Overloading an existing set of wires can lead to a melted wire harness and fire.

    I suggest you learn some basic electronics and calculate the loads.
    Last edited by TruckinMP3; 03-09-2011 at 04:56 PM. Reason: autolinks to the wiki suck
    TruckinMP3
    D201GLY2, DC-DC power, 3.5 inch SATA

    Yes, you should search... and Yes, It has been covered before!

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    Constant Bitrate knownchild's Avatar
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    id say its about 10-14 gauge and it will only be powering my carputer, will putting a fuse on prevent the chances of fire?
    Never accept STOCK equipment.

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    Maximum Bitrate kegobeer's Avatar
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    The melting is something I didn't consider. Thanks for that info, Truckin.

    To the OP: if you plan on installing a carpc, you should consider just running a separate 12V line directly from the battery to a distribution block. Just don't go cheap on the components - make sure you use a 4GA or bigger wire from the battery, use a good inline fuse, and use a good distribution amp. It will definitely make things a lot easier if you decide later to add more equipment - like a nice 12V powered USB hub or an amplifier, for instance.

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    Constant Bitrate knownchild's Avatar
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    Quote Originally Posted by kegobeer View Post
    The melting is something I didn't consider. Thanks for that info, Truckin.

    To the OP: if you plan on installing a carpc, you should consider just running a separate 12V line directly from the battery to a distribution block. Just don't go cheap on the components - make sure you use a 4GA or bigger wire from the battery, use a good inline fuse, and use a good distribution amp. It will definitely make things a lot easier if you decide later to add more equipment - like a nice 12V powered USB hub or an amplifier, for instance.
    Actually im planning on going with a mini internal amp that i think ill run off of one of the 4 pin molex cables from my PSU. i have some 25amp and 30 amp fuses with fuse holders that connect right to the line.
    Also the wire is 14 gauge.
    Never accept STOCK equipment.

  7. #7
    Neither darque nor pervert DarquePervert's Avatar
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    Do yourself a favor and run a power line back to the battery for your power. Put a fuse on it close to the battery.

    It's time this gets added to this thread:

    Have you looked in the FAQ yet?
    How about the Wiki?



    Under normal circumstances, a signature would go here.

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    Constant Bitrate knownchild's Avatar
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    Way to draw a picture lol

    But its not a cig lighter power source. (could be same difference i guess)
    I do however power my screen with the cig lighter.

    Its just such a pain to get the wires through the firewall.
    Never accept STOCK equipment.

  9. #9
    Maximum Bitrate kegobeer's Avatar
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    Quote Originally Posted by knownchild View Post
    Way to draw a picture lol

    But its not a cig lighter power source. (could be same difference i guess)
    I do however power my screen with the cig lighter.

    Its just such a pain to get the wires through the firewall.
    Believe me, it's not that bad. There's probably a forum dedicated to your car's make and model, and in there someone will have information on the easiest way to get power from your battery to your trunk. There are usually factory grommets in the driver/passenger firewall that you can use. It took me about 20 minutes to locate and get to the grommet, drill a hole in the grommet, and fish a 4GA wire through.

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    Constant Bitrate knownchild's Avatar
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    well about that i already have a cord running through the firewall that bestbuy installed for my remote start, i added some cord from there cord to my carputer but the fuse at the battery melted and did not blow so it kind of freaked me out. I think they have a too high of amperage fuse at the battery.

    I could run another cord through but i just cant see where its popping out at.
    Never accept STOCK equipment.

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