voltmeter question - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
Rectifier, Diagrams, etc

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post #1 of 33 (permalink) Old 04-24-2012, 05:40 PM Thread Starter
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voltmeter question

I'm looking at getting this voltmeter
http://www.ebay.com/itm/Show-Chrome-...431df3&vxp=mtr

I have read here that a VM direct to the battery is best which is what this would do..but that means also that it is always on. How much would this draw??
Or if I were to wire to my relay, how different is that voltage?

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post #2 of 33 (permalink) Old 04-24-2012, 05:49 PM
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The most accurate reading would be direct to the battery via a relay. You may loose maybe 1/10 volt? A mini relay is fine, since there is very little draw from the meter.
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post #3 of 33 (permalink) Old 04-24-2012, 05:57 PM
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a relay between the VM and battery is such a small voltage drop that the meter won't even pick it up. also not pictured is a 5 amp inline fuse between the battery and the relay.
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post #4 of 33 (permalink) Old 04-24-2012, 06:09 PM Thread Starter
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so i could just tap the wires into the pos and neg that i already have with the relay for the driving lights??

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post #5 of 33 (permalink) Old 04-24-2012, 06:17 PM
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Honestly, you could tap the 12v anyplace.... but again, direct to battery is the most accurate reading. If the relay you are talking about also powers driving lights, you will get a lower reading than what is at the battery....
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post #6 of 33 (permalink) Old 04-24-2012, 06:57 PM
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don't tap the Running light power source.. that is going to show a huge voltage drop. You need to wire directly to the battery. the Brown wire could be substituted for the blue wire you tapped into earlier for your Running Light Trigger Wire. But both Red and Black wires in my diagram need to go back to the battery for best results.
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post #7 of 33 (permalink) Old 04-24-2012, 08:00 PM
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I used this one:
http://www.martelmeters.com/products.php?cat=1

I had it connected to the battery full time. It draws less power than a battery loses on it's own. So could tell at a glance if I needed to put the battery on a charger....and could monitor voltage while doing so. (I only used my charger like two times in 5 years BTW)

Downside it's not back lit, so you'd need to add a light to see it at night. See my "Dash" photos in my photo site below.

I like the fact it was a digital readout, so no guessing what the actual voltage was.

Datel makes one that uses lit LEDs... But uses enough power to do this you need to have it switched...

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post #8 of 33 (permalink) Old 04-24-2012, 09:56 PM
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Quote:
Originally Posted by Knifemaker View Post
...It draws less power than a battery loses on it's own...
General rule of thumb is 1% drain per day.... just sayin'...
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post #9 of 33 (permalink) Old 04-24-2012, 10:17 PM Thread Starter
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i guess my main question is that the one i am looking at has battery terminal ends. How or why would they make it that way if it drew too much going straight to the battery

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post #10 of 33 (permalink) Old 04-24-2012, 10:34 PM
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The best possible reading would be directly to the battery. The CO making these things has no way to know where we are looking for a reading within the system. So I would assume for them , stick it on the battery! Regardless you are going to get two readings, engine running--stator out put--engine not running--batt voltage.

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