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Old 04-15-2012, 04:36 PM   #1
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Ok I got a digital volt meter!!!

Now what? I tried it on dc side in the cigarette liter and blew the fuse? The instruction are half in Spanish? What do I need to know to use this miracle of man kind in regard to my batteries?
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Old 04-15-2012, 04:56 PM   #2
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A volt meter should not blow a fuse unless you are grounding it out on the hot leg.
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Old 04-15-2012, 05:01 PM   #3
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Well it blew the fuse. Is there a simple for first graders " How to use my volt meter to understand what my batteries are doing" ?
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Old 04-15-2012, 05:10 PM   #4
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If you stuck the probe into the lighter socket, the hot and ground points in the socket are close together and you probably shorted them with the probe. Try to read the main batteries. the post are far apart and you will not be in danger of shorting out the probes.
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Old 04-15-2012, 07:47 PM   #5
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You may have used the "amperes" function!?That would surely blow the fuse.
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Old 04-15-2012, 07:51 PM   #6
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youtube.com has videos on using a volt meter
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Old 04-15-2012, 08:01 PM   #7
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Assuming it a muttimeter set it to DC volts and check at the battery terminals.
One thing you know for sure is you have power to the lighter .
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Old 04-15-2012, 08:03 PM   #8
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Place the voltmeter on DC volts (12V or higher). Install the black lead into the Common connector on the voltmeter. Install the red lead into the connector labeled V,ma, etc. Touch the red lead onto the + post of the battery, and the black lead onto the - post of the battery. Read and record the voltage. do each battery the same way. There is a table that suggests battery condition versus static voltage. I can't seem to find it now. Maybe some one esle can supply it.

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Old 04-19-2012, 08:24 AM   #9
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Thanks jlfbatonrg is this something like the table you where suggesting?

Battery voltages
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Old 04-19-2012, 09:24 AM   #10
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Testing voltages through the cigarette lighter plug is tricky to say the least. Assuming you had the leads correctly inserted into the voltmeter I'm going to assume again that you stuck both probes into the cigarette lighter. As someone stated, you most likely made contact between the hot and negative at the same time. Pooooof!

Agree on checking voltages at the battery terminal, but if you must use the cig lighter, use some electrical tape around the probe of the hot lead leaving a mm or less of the tip exposed. Push it straight in to touch the center plug and exert a little pressure to hold it there. With the negative lead, touch any part of metal outside of the plug, like a screw holding the dash in place or the brake pedal arm. Try a different area if nothing registers, as "most" of the metal i the MH is commonly connected together. For just checking battery voltage - use the battery, but if you have to check the cig lighter, this is the way I would do it.

Happy trails.

One other way, be "wary, wary" careful.
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Old 04-19-2012, 10:41 AM   #11
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When you say you blew the fuse which fuse are you referring to?

The lighter fuse or the fuse that is inside the voltmeter?
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Old 04-19-2012, 11:02 AM   #12
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Homeless- you are in for a lot of fun. once you are familiar w/your new toy and want more flexibility, you'll want to round out your tool kit w/a decent analog multimeter or VOM (volt-ohm-meter) as the needle sweep can tell you things a jumbled message of scrolling numbers cannot, and a Power Probe 3. An earlier poster suggested YouTube for instructional videos, which might just be the best use of YT. Do a search there for VOM, digital volt meter, analog volt meter and Power Probe. An idiot can learn this stuff w/all the free resources available.

Long before those fun tool additions, check out the 12 Volt Side of Life, a truly excellent primer on RV things 12V. This has been up on the internet for quite a while as internet stuff goes, and cannot be beat for a quality readable explanation for RV'ers.
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Old 04-19-2012, 11:13 AM   #13
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Homeless,

that's the table i was looking for. It should provide you with some general info on battery condition. Good luck

Jim
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