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Battery question
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TMiller/NC View Drop Down
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Joined: 11 Sep 2009
Location: Lenoir, NC
Points: 1776 		Post Options Post Options   Thanks (0) Thanks(0)   Quote TMiller/NC Quote  Post ReplyReply Direct Link To This Post Topic: Battery question
    Posted: 30 Nov 2016 at 8:01pm
When I remove the + cable (which is ground) on my CA and connect a volt meter between the + battery post and the disconncected battery cable (ground) I read 6.xx volts.  Is this normal?   This is with light switch off and the key switch off.
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Gerald J. View Drop Down
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Joined: 12 Sep 2009
Location: Hamilton Co, IA
Points: 5636 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Gerald J. Quote  Post ReplyReply Direct Link To This Post Posted: 30 Nov 2016 at 8:07pm
The volt meter is very sensitive, needs very little current, it is showing there is come current from the negative post to ground, but that can be literally a few microamps for a digital meter to read. Could be the current in damp dust, or a problem with the regulator or a switch.

A test lamp makes a better test, even better if the lamp takes an amp to light. Then you can test the voltage across the lamp between the battery post and the ground cable. If there are several volts with the lamp in the circuit you need to find the load because it will discharge the battery in a while.

Your meter probably has a current scale but its easily damaged by excess current at a minimum blowing a fuse inside but the damage can be greater if the current is too much for the circuits in the meter.

Gerald J.
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TMiller/NC View Drop Down
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Joined: 11 Sep 2009
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Points: 1776 		Post Options Post Options   Thanks (0) Thanks(0)   Quote TMiller/NC Quote  Post ReplyReply Direct Link To This Post Posted: 30 Nov 2016 at 8:29pm
Thanks Gerald, I hadn't thought of putting an amp meter in series to check for amp draw. I am not getting any spark when removing the cable.  Digital meter has a 10 amp meter built in so I might try putting it in series.    Thanks, Tim
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DougS View Drop Down
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Joined: 03 Nov 2011
Location: Iowa
Points: 2490 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DougS Quote  Post ReplyReply Direct Link To This Post Posted: 30 Nov 2016 at 8:46pm
Nooooo. Do it through way Gerald said. One wrong move doing it your way and poof goes the fuse in your meter. Many times those fuses are a bit unusual and very hard to find.

I've checked leakage directly, but I always used an amp clamp device which isolated the meter.


Edited by DougS - 30 Nov 2016 at 8:48pm
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