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Stupid question about OPUS wiring

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  • Stupid question about OPUS wiring

    Well, my OPUS 150 watt PSU is ordered and should be here in a day or two. I went out to walmart and bought a 200 watt amp. wiring kit for 10 bucks, I figured this would help with running power to the carputer.

    However, when looking at it, I realised that there is only one wire meant to come from the battery (+) to the amp (or OPUS in this case), and then a 2 foot grounding wire is meant to be used for the ground.

    Anyway, how exactly should I wire the OPUS? Obviously it will have a 12v positive and a negative, should I just run the OPUS's 12v + to the battery's 12v +, and then ground the OPUS's - to the frame of my car? Or am I going to have to run a wire all the way back to the battery's negative terminal?

    Thanks
    Zen Fat Loss

  • #2
    It is my understanding (through testing) that you only need a good ground and need not run it back to the battery. (someone will correct me if i am wrong im sure)

    What I did was ..... removed a BIG screw that held the back seats in place and grinded the paint off the screw and the area around the hole the screw gets secured to.

    Then I tested the conductivity of the connection and it worked fine.


    It was alot easier this way ..because now I only have 1 wire running from the bat and the other is only about 12 inches long from the screw already in the trunk to the ground.

    Hope that helps
    2002 Suzuki Aerio Sedan ...NOT the stupid wagon

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    • #3
      The ground wire should be as short as possible, meaning DO NOT run it back to the battery's negative find a connection to the frame of the car as close to the opus as possible.
      My obligatory progress meter.
      [|||||||||||||||||||-] = 95%
      Basic Install done and all bugs fixed.
      Need: GPS, OBD

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      • #4
        Alright, thanks a lot for the replys guys. That's what I was thinking, just wanted to make sure I didn't fry anything by hooking it up wrong.

        One last question, and I think I'm good to go. A 20 amp fuse is plenty for powering a carputer plus a 7" lilliput, correct?
        Zen Fat Loss

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        • #5
          I currently have a 50 self resetting circuit breaker coming directly off my battery and mounted under the hood ( This part has been completed already) This will break the whole system in case of a large draw/jolt.

          I plan to adda few "inline fuses" to break components as deamed needed by thier rating.

          not saying you are righ or wrong .... just my plans.
          2002 Suzuki Aerio Sedan ...NOT the stupid wagon

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          • #6
            According to the opus setup info, you ARE supposed to run a wire to you neg terminal, and your possitive terminal on your battery. But who really follows instuctions....
            BossTone74

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            • #7
              I think a 30A fuse is needed.
              EPoX mATX SocketA w/onboard Geforce4MX / 512MB PC2700 / AthlonXP 1600
              Lilliput / DVDrom / Opus 150W / WD 3.5" 160GB / SB Audigy NX
              XP home / Road Runner / iGuidance 4.0

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              • #8
                That would be a 30amp fuse ....over...did I hear a niner in there?
                BossTone74

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                • #9
                  Ack... The amp wiring kit I bought came with a 20 amp fuse with 12 guage wire...

                  Can I just buy a 30 amp fuse for it, or will 12 guage not handle that? Time to move up to 10 guage?
                  Zen Fat Loss

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                  • #10
                    Are you powering the amp and opus seperatly?

                    I use a 15A fuse on my opus.
                    CarPC status: iPod, 3,456,217 songs so **** you

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                    • #11
                      There is no amp, just an OPUS plus a lilliput LCD
                      Zen Fat Loss

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                      • #12
                        Well then 15A fuse is what you need, put it under 12 inches from the battery, remember theres also a 20A fuse in the opus as well, for extra safety.
                        CarPC status: iPod, 3,456,217 songs so **** you

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                        • #13
                          Originally posted by Motoko
                          Well then 15A fuse is what you need, put it under 12 inches from the battery, remember theres also a 20A fuse in the opus as well, for extra safety.
                          Alright, thanks for your help. One last question... Will a 20A fuse work okay, or is it a better idea to just go out and buy a 15A fuse?
                          Zen Fat Loss

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                          • #14
                            Yeh i guess seeing as the OPUS has one too.
                            CarPC status: iPod, 3,456,217 songs so **** you

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                            • #15
                              Originally posted by Motoko
                              Well then 15A fuse is what you need, put it under 12 inches from the battery, remember theres also a 20A fuse in the opus as well, for extra safety.

                              15A Fuse in the Opus
                              I'll spout simplistic opinions for hours on end.
                              Ridicule anyone who disagrees with me,
                              and generally foster divisiveness,
                              cynicism and lower level of public dialog!

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