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  • Help locating accessory power

    Hi,

    I installed Boss speakers (and due to lack of knowledge) I ran the amp directly to the battery terminals and just remove the fuse when the bike is not in use. I was thinking about adding an on/off switch but thought it better if I ran to an accessory power line. Does anyone have a photo of where a wire is located that I can tap into? The amp is currently mounted in the saddle bags.

    Thanks!

  • #2
    I would run a dedicated circuit to run an amp. It’s going to pull a good amount of juice.


    Wherever you go in life, ride there if at all possible.

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    • #3
      Your fuse box is most likely setup up with 2 halves like on my 2009 RS. 3 of the fuses run off the red (hot all the time) wire and 3 run off the ignition switch wire. Mine is white. Don't know the color with your 2005.
      The hot wire and ignition wire are heavy gauge and are connected to the underside of the fuse box. You can tap into the ignition wire along with whatever rated fuse your amp is.This will only allow your amp to turn on when the ignition switch is on. I would put an additional on/off switch between the fuse and the amp so that you can turn the amp on and off while the ignition switch is on. This switch could be located in the fairing. Using this additional switch will also help from drawing extra amps while starting the bike by turning the amp off until the bike starts.

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      • #4
        I would run the dedicated circuit like JD is talking about but I would run it thru a relay and power the relay with one of the ign power wires Grubsie is referring to. As far as a secondary switch I think I would skip that and just turn the radio off as a switch. Or another thought is to use the wire that powers the passing lamps, they don't power up until the bike is running. Tapping into that wire to power the relay would also act as an off switch during start up. I would also get my primary power from the battery side of the starter relay to keep it off the battery itself. To me it is just a cleaner job that way.

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        • #5
          Thanks for the replies, I like the idea of tapping into the passing lamps is sounds the simplest way to me. Does anyone have photos of which wire to tap into?

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          • #6
            Running a dedicated, heavy gauge (fused) wire from the battery to the amplifier can be turned on and off by running through a relay in series rated to supply enough amps to the unit and triggered by tapping in on any wire that is energized by turning on the key (front running light, etc) wire, as the relay coil draws minimal current.

            Same principal as your starter relay. Just remember, if you tap into the passing light wire it’ll turn off the relay switching to high beam at night, or vise versa, depending on how they are wired.

            Find them just about anywhere.

            OLS 40/30 Amp Waterproof Relay Switch Harness Set - 12V DC 5-Pin SPDT Automotive Rel... https://www.amazon.com/dp/B01N66W2XF..._jmH2Ab3GVYRS5

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            • #7
              You never stated your comfort level with fabricating electrical systems so I'll assume by your asking that you aren't well versed in it.

              First: Do one thing wrong with electrical & you can burn your bike to the ground while you're on it - along with the building it's in.
              Second: Get a shop manual with a color wiring diagram & follow it carefully. Sometimes they're wrong on colors, know what you're looking at.
              Third: ALWAYS use a relay to power added accessories & use fuses on both the mains power to the relay and the switched side to your accessories.

              Ask questions & include pictures if you can get them so everyone here can give you accurate answers.
              Electrical fires rarely give you a second chance. Good luck.
              Last edited by BubbaKahuna; 04-20-2018, 11:16 AM.

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              • #8
                Thanks for the reply, about 30 years ago I used to do circuit board repairs on personal computers but that feels like a lifetime ago!

                I have the bike in the shop now getting the factory exhaust installed, with all this talk of fire potential, I'm going to play it safe and ask the dealer what they will charge to move the power directly off the battery to the accessory line and hope it's not too much.

                Comment


                • #9
                  If the dealer's number is high, I'm sure you can tackle it yourself. Electricity hasn't changed much in 30 years.

                  As for the manual and color wiring diagram, do a little looking around for something already posted. If you don't find something on the web I'm sure can point you to the right source.

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