how to wire up the voltmeter? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 5 (permalink) Old 05-30-2008, 08:27 AM Thread Starter
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how to wire up the voltmeter?

someone was kind enough to post this before...

https://www.vn750.com/forum/showthrea...ltmeter&page=3

but honestly... i'd have a better chance reading greek.

so if i want to wire in a volt meter between my guages, what wires do i need to connect to it? can i pull them out of the headlamp bucket, wire to the accessory plugs, wire it inline with something else?

thanks!
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post #2 of 5 (permalink) Old 05-30-2008, 08:43 AM
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You really want the volt meter leads connected directly to the battery terminals. This will tell you true battery voltage, not the voltage at some other point which would already have incurred a voltage drop.

That is why the post showed connecting with a relay. The relay acts like a switch so that when the bike is off, the volt meter is not draining the battery. In a perfect world, the volt meter would have infinite impedance, in otherwords, not drain the battery, but that isn't reality.

The other choice is a switch inline with the meter so you can shut if off when the bike is off.

Or, use the headlight leads for the volt meter. Measure the battery voltage at the battery terminals, then add the difference to the voltage at the headlight. You would have a pretty constant number you would be mentally adding to the value shown on the volt meter.

Jon

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post #3 of 5 (permalink) Old 05-30-2008, 09:37 AM
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Quote:
Originally Posted by 93VN750 View Post
Or, use the headlight leads for the volt meter. Measure the battery voltage at the battery terminals, then add the difference to the voltage at the headlight. You would have a pretty constant number you would be mentally adding to the value shown on the volt meter.

Jon
I like what Jon said...

I have a Signal Dynamics Heads-Up single LED voltmeter, and I tapped into the front marker lights. Since there's a fixed voltage drop through the wiring harness and the ignition at that point, it causes the meter to change from RED to GREEN at about the same voltage level that the battery changes from discharging (running the bike off of battery power) to charging (higher RPM, excess current from the R/R now recharging the battery). This makes the voltmeter a poor man's charging meter also, which is really why we install at meter in the first place. The single LED mounted in the is pretty unobtrusive and elegant.
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Darrel
'03 Vulcan 750 (90k miles)
-Corbin Seat
-V-Force Windshield
-LeatherLyke Touring Bags
-Chrome Luggage Rack
-Headlight Modulator
-Brakelight Flasher
-MF Battery
-Heads-Up Voltage Monitor
-Replaced Stator (9,000 and 16,000 mi.)
-Oil-cooled Stator Mod (photos)
-Replaced and Relocated R/R
-Greased rear splines
-Fused Stator (photos)
-Metzeler ME880 Marathon 170/80-15 (Rear), 110/90-19 (Front)
-TOC MCCTs installed
-Headlight Relays
SOLD - 2013
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post #4 of 5 (permalink) Old 05-30-2008, 10:50 AM Thread Starter
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"I have a Signal Dynamics Heads-Up single LED voltmeter"

ooooh.... that seems like a good option. i couldnt find it on their website though. also, did you just cut into the wiring and splice it inline?
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post #5 of 5 (permalink) Old 05-30-2008, 03:53 PM
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I popped the wires out of the harness connector and soldered leads on there, then added an inline connector to the voltmeter controller so I can still remove the instrument cluster. I think I mounted the controller circuit box under the tank.

The added connector in on the left of the attached photo. What it doesn't show is the LED wires going into the cluster behind the connector.
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Darrel
'03 Vulcan 750 (90k miles)
-Corbin Seat
-V-Force Windshield
-LeatherLyke Touring Bags
-Chrome Luggage Rack
-Headlight Modulator
-Brakelight Flasher
-MF Battery
-Heads-Up Voltage Monitor
-Replaced Stator (9,000 and 16,000 mi.)
-Oil-cooled Stator Mod (photos)
-Replaced and Relocated R/R
-Greased rear splines
-Fused Stator (photos)
-Metzeler ME880 Marathon 170/80-15 (Rear), 110/90-19 (Front)
-TOC MCCTs installed
-Headlight Relays
SOLD - 2013
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