Wire for digital volt meter

Discussion in 'General VFR Discussions' started by jambman, Jul 15, 2016.

  1. jambman

    jambman New Member

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    I have installed a digital volt meter to at least know in advance when the dreaded stator/rectifier issue arises. I made a small bracket that attaches to one of the forward bolts holding the gas tank. I certainly don't want to wire direct to the battery as it would be "on" all the time. Any clue as to a hot lead I can tap into that is only energized when the ignition is on? Thanks in advance!
     
  2. OOTV

    OOTV Member

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    I used the license plate light lead. This way if there was an issue, it's just the license plate light and not my rear brake light lead.
     
  3. OOTV

    OOTV Member

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    BTW, I am using a power controller which gives me options for both, always live and switched outlets. However, taking into account if don't use a power controller, you can do the same with a 12v relay. I used the power lead directly from the battery and used the ground as the switched leg on the relay. This way the 12v + voltage to the meter is direct and not running through any other circuit or wire path. If you don't have familiarity with what I'm talking about, I'll see if I can find the drawing I did.
     
  4. mello dude

    mello dude Member

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    You could easily put a toggle switch in the circuit - the plus is then you can check the battery before you fire it up. I put the switch under the seat, although there are plenty of more accessible spots up front. Direct to the batttey with a 1 amp fuse in line on the plus side is the way to go IMHO....
     
  5. OOTV

    OOTV Member

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    Until you forget to turn off the switch...

    That's one of the reasons I went with the power controller, although itonically it's parasitic draw is probably the same as a meter, but the meter I have also has a back light which would draw a bit more juice than a meter itself. I setup the power controller to work with a momentary switch so that I can press a button, get the reading on the meter and release the button. When the ignition triggers it applies constant voltage on that same circuit, thus allowing no key monitoring, active monitor while the bike is on and no worrying about forgeting to flip a switch when I turn the bike off. Technically the same can be done with a relay I believe, where by adding a momentary switch to trigger the relay in addition the the switched circuit.
     
  6. mello dude

    mello dude Member

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    Admittedly, I never switch mine off anyhoo.... the draw between the clock and meter is in the 1 or 2 MV range so its never an issue.
     
  7. jambman

    jambman New Member

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    Thanks for all the replies. I went with a direct plug in to the battery that can be disconnected when I am not riding. Using the same 2 prong flat plug that I use for the battery tender. That way the display of volts is always on when I am riding.
     
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