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Thread: ignition wire for opus psu

  1. #1
    SMKFree liquid_smoke's Avatar
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    ignition wire for opus psu

    Ok, here is my issue.

    I have a key code for the wire harness im using with my radio (sony). The wire harness says that the yellow wire is a 12V Battery/Constant 12V+ and the Red wire is 12V Ignition/switched 12V+

    Dosent it seem weird that the red wire is the ignition wire??
    I would have thought it would be the other way around. I've been pondering on this for a day or two and im afraid to actually hook the Opus PSU up not knowing exactly 100% that i have the right wire.

    My question is this, if i leave it the way it is now, with the yellow opus wire connected to the yellow 12V Battery wire, will it damage the PSU or cause it to not function correctly. Dose the ignition wire in a car normally have constant power or does it just send a signal when the car is first turned on and another when its off. If i leave it on the yellow battery wire will the PSU go into a startup/shutdown loop?

    If i can get this issue cleared up, or confirmed that neither wire will destroy the PSU and i can basicly do a trial and error i can proceed and install my carputer tonight

    Thanks in advanced.

  2. #2
    Raw Wave kickercivic1's Avatar
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    well i didnt read all the thing you wrote but if i were you i will run the ing wire from the opus to the fuse box and plug it the ACC or in other words the the radio fuse.

  3. #3
    SMKFree liquid_smoke's Avatar
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    Its way harder for me to run the wire to the fuse box vs the radio wire harness. Plus i allready have run the wires. Im just dont want to connect the psu to them.

  4. #4
    Maximum Bitrate osirisdon's Avatar
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    Dude in car applications::::
    12v constant will always be YELLOW
    12v accesory will always be RED
    ground will always be BLACK

    This applies to aftermarket products. Usually the factory or manufacturer of specific vehicles choose to use there OWN damn color codes. For example my car has a BLUE 12v accessory line. WTF? lol

    Your best friend is a multi-meter as well.
    1. Turn your ignition all the way OFF. Search for 12v. Once you find it, that is your CONSTANT 12v line.
    2. Turn your ignition to the accesory point. Search for 12v. Do not search in the wire you already found in step ONE!. Once you find it, double check and turn your ignition off, if you loose 12v then you just found your 12v accessory line.
    3. Ground is Ground wich is any UNPAINTED spot of the chassis.

    Good luck.

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