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10-12-2017, 01:01 PM
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  Join Date: Aug 2017 Location: Santa Clara, CA
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(Thread Starter) |   Not Ranked : 0 score  I made this thread to ask HOW to measure current draw off a MS3 battery. I have a separate thread with me actually tracking down the source of my battery drain and will update that as I continue to test. To close out this thread and to summarize my findings. - There are two ways you can go about measuring current draw off the battery. Hooking amp meter in series with the negative battery cable OR by using a low current amp clamp. - If using the amp clamp, you can't simply clamp around the negative battery cable because it splits into two lines and both have different current flows (current is directional). To correctly use the clamp you need to measure each line separate and then add them together. - After trying both methods I prefer hooking up an amp meter in series. Just be sure to not activate any circuits that could blow your meter's fuse. SIDE NOTE: For my 2008.5 MS3 it takes exactly 30 minutes for the electronics to time out. I couldn't find this info anywhere so hopefully it helps someone out. Last edited by Smallville; 10-16-2017 at 10:58 AM. Reason: Updated with more info |
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