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Different voltages on same power and ground


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Check your fuses with a meter. I have seen bad fuses that look good before.

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All of the fuses are good after checking them. The last thing I did was checked my 2 battery's first thing in the morning. The rear was reading 12.2 and the front was reading 12.3 on the side post, and 9 on the top post where the 2 1/0 runs are. I took them off and brushed any dirt and corrosion off and put them back on. They read back to 12.3 and my rear battery and SQ amp were at 14.4 on startup. Not sure if that's solved it but I'll keep checking the next week. 

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  • 3 weeks later...

You may elect to perform voltage drop measurements across the various cables, fuses, and connections to find the source of the problem.  This should be done under load, so a DMM with a MIN/MAX scale set to record voltage over time would be best.

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