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<blockquote data-quote="DNick454" data-source="post: 6283229" data-attributes="member: 600755">No, because just sitting there at idle with the system off, there is no draw and the battery isn&#039;t being sucked dry, so the DMM reading should be fine.Here&#039;s a quick test you can do. Have someone sit in your car controlling the stereo. You should be under the hood with a DMM set to DC voltage. Touch it to the terminals on the battery with the car and system off.Now start pounding on the system, it should obviously go down..Now start the car but turn the stereo off and take the reading off the battery. Should be a higher resting voltage now with the car running and the alt spinning (not a ton at idle, but at least a BIT).Now start the stereo bumping with the car running and note what happens.Let me know what the readings come out like. On my Honda Accord with a measly *** 90 amp alt (stocker) it rests somewhere in the high 12V but when I start the car, it rests a little over 14V.It goes down a tad for both readings with the stereo cranked. Should be something atleast somewhat similar for your case. Let me know the results //content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif</blockquote>

[QUOTE="DNick454, post: 6283229, member: 600755"] No, because just sitting there at idle with the system off, there is no draw and the battery isn't being sucked dry, so the DMM reading should be fine. Here's a quick test you can do. Have someone sit in your car controlling the stereo. You should be under the hood with a DMM set to DC voltage. Touch it to the terminals on the battery with the car and system off. Now start pounding on the system, it should obviously go down.. Now start the car but turn the stereo off and take the reading off the battery. Should be a higher resting voltage now with the car running and the alt spinning (not a ton at idle, but at least a BIT). Now start the stereo bumping with the car running and note what happens. Let me know what the readings come out like. On my Honda Accord with a measly *** 90 amp alt (stocker) it rests somewhere in the high 12V but when I start the car, it rests a little over 14V. It goes down a tad for both readings with the stereo cranked. Should be something atleast somewhat similar for your case. Let me know the results [IMG]//content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif[/IMG] [/QUOTE]

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