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Thread: Powering PC noob question

  1. #1
    Newbie
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    Oct 2008
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    Powering PC noob question

    Hey Guys,

    Spent a good part of my day reading up on powering a Car PC. I believe my best option would be the Opus as it seems to do everything I require. Problem is I have never done a stereo install in a car and I am in the process of learning as I would like to do this install myself.

    Anyway, suppose I would like to have my carputer in the boot and my battery is located at the front of the car. How does the opus actually connect to the cars battery system? Do I have to run power cables from the back of the car to the engine bay and then just simply connect these opus power cables to the battery using a fuse? Is it difficult to get the power cables through the firewall?

    I understand it would be different for each car, but how does everyone generally get their power cables through the firewall into the engine bay?

    Sorry I tried searching, but if there is an existing thread could you please give me the link. THanks for any help in advance!

  2. #2
    Newbie JerzeyLegend's Avatar
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    Oct 2008
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    From what I have been reading, it seems you power these PSUs they same way you would power a amp.

    Find a good body ground, bare metal.
    I would assume remote is still run from the HU?
    Run power cable from battery (make sure inline fuse is no more than 6 inches of wire away from the battery post), through the firewall (there is usually an unused grommet or two, or another cable which has enough room to run another wire.
    VOILA! Put the respective wires into the PSU with terminal connectors. I don't know if these PSUs come with protectors but if you can get your hands on something to keep stuff like metal from touch or falling on the terminals, that would be nice. Just from experience hooking up audio.

  3. #3
    Neither darque nor pervert DarquePervert's Avatar
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    Quote Originally Posted by Marbig View Post
    Hey Guys,

    Spent a good part of my day reading up on powering a Car PC. I believe my best option would be the Opus as it seems to do everything I require. Problem is I have never done a stereo install in a car and I am in the process of learning as I would like to do this install myself.

    Anyway, suppose I would like to have my carputer in the boot and my battery is located at the front of the car. How does the opus actually connect to the cars battery system? Do I have to run power cables from the back of the car to the engine bay and then just simply connect these opus power cables to the battery using a fuse? Is it difficult to get the power cables through the firewall?
    (+) to the battery.
    (-) to any acceptable ground. Cassis grounbd is what most people use, out of convenience.
    Yes, you'll have to run a power cable to the battery.
    As far as running wires throught he firewall, it's dependint on your make/model and how convenient your firewall is for running cables.

    I understand it would be different for each car, but how does everyone generally get their power cables through the firewall into the engine bay?
    There should be an existing grommet with cables running through it already. Just use that, if you can.
    Look low on the driver side behind the dash.

    Sorry I tried searching, but if there is an existing thread could you please give me the link. THanks for any help in advance!
    No links. Impossible to give you the firewall details, since it's so vehicle-dependent.

    Quote Originally Posted by JerzeyLegend View Post
    From what I have been reading, it seems you power these PSUs they same way you would power a amp.
    Pretty much exactly the same.

    Find a good body ground, bare metal.
    I would assume remote is still run from the HU?
    Maybe. Maybe not.
    Remote (also IGN or ACC line) needs an ignition-controlled +12v power line. Not all headunit harnesses have one.

    Run power cable from battery (make sure inline fuse is no more than 6 inches of wire away from the battery post), through the firewall (there is usually an unused grommet or two, or another cable which has enough room to run another wire.
    VOILA! Put the respective wires into the PSU with terminal connectors. I don't know if these PSUs come with protectors but if you can get your hands on something to keep stuff like metal from touch or falling on the terminals, that would be nice. Just from experience hooking up audio.
    You've got it right.
    In some cases 6" from the battery isn't possible. Within 12" is sufficient.
    But definitely get that fuse as close to the battery as possible. I believe mine is about 8" along the power line.
    Have you looked in the FAQ yet?
    How about the Wiki?



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