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<blockquote data-quote="AlterEgo99" data-source="post: 5938519" data-attributes="member: 610253">Well, I thought I new the basics of operating a voltmeter but a few terms have me confused and I am SURE someone can help.&nbsp; //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gifFirst, here is a direct quote:&quot;To check for a good ground reference, take a volt-ohm meter (VOM) and measure the resistance between the chassis of the radio and the shield of the RCA line level outputs of the radio. This reading should indicate a direct short.&quot;How should I set my digital VOM to perform the above action?Second, does anyone know what a &quot;ground sniffer&quot; is?&nbsp; Do you really need one or can a good ground point be determined simply from a VOM?I&#039;m attempting to troubleshoot an alternator whine problem and am going to be trying to determine the source step by step.Thanks!</blockquote>

[QUOTE="AlterEgo99, post: 5938519, member: 610253"] Well, I thought I new the basics of operating a voltmeter but a few terms have me confused and I am SURE someone can help. [IMG]//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif[/IMG] First, here is a direct quote: "To check for a good ground reference, take a volt-ohm meter (VOM) and measure the resistance between the chassis of the radio and the shield of the RCA line level outputs of the radio. This reading should indicate a direct short." How should I set my digital VOM to perform the above action? Second, does anyone know what a "ground sniffer" is? Do you really need one or can a good ground point be determined simply from a VOM? I'm attempting to troubleshoot an alternator whine problem and am going to be trying to determine the source step by step. Thanks! [/QUOTE]

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