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Old 02-07-2009, 09:10 AM   #1
One Less Harley OP
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Conecting volt meter to G/S

I'm connecting a stock volt meter to my 84 G/S, and need to know what color wire to connect it to.

In the volt meter- I've got a brown wire, grey and white (ground and gauge light), these are no problem, but I have a red wire which goes to the needle which I don't know what to connect it to in the headlight nacelle. I can't connect it to the red wire which goes to the ignition switch because that is constantly hot.

So where do I need to splice into??

Thanks..
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Old 02-07-2009, 12:32 PM   #2
Caddy82rats
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You have only to find a + after ignation switched on
You can hotwire one from the ignation switch (Tist wich one with the volt meter)
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Old 02-07-2009, 03:43 PM   #3
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I don't know the particulars of your bike, but IF you are picking up grounds and so forth inside the headlight, I would be tempted to run the "Hot" for the VM to the bulb feed itself (assuming that the headlight is "on" when the ignition is on!), other wise, as said above, find any positive that is turned on when the switch is on. You could do this right at the switch with a little ingenuity etc.

FWIW, your voltmeter, if you are picking up voltage in the headlight bulb and not at the battery, will help in showing a "relative" voltage... i.e. it may in fact be lower than the battery voltage because of wire resistance etc, but you can still use the information to good advantage... if the voltage is lower than what you normally see, there is something going on. In other words, don't take the vm reading to be absolute gospel until you have compared it to the battery voltage, then you will know what the difference is.... it could easily by several tenths of a volt, or more, different.


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Old 02-07-2009, 03:57 PM   #4
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I ran the lead to a switched green wire off the ignition, and there is a voltage drop com paired to the battery voltage 12.75 at the battery vs about 11.5 at the ign switch.

Thanks for the info guys
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Old 02-07-2009, 04:00 PM   #5
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Wow, that's a big drop.... maybe you can find a hot wire that has'nt been routed to Nebraska and back before you tapped into it....????

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Old 02-07-2009, 04:07 PM   #6
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Might be a good idea to find out where that volt drop is occurring. Could be a high resistance connection or the ignition switch itself.
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