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<blockquote data-quote="keep_hope_alive" data-source="post: 6909936" data-attributes="member: 576029">you need to use a multi-meter to measure the voltage at the amp terminals, and trace the issue that way.&nbsp; then you&#039;ll know you have voltage or ground issues.&nbsp; if you use AGU fuses, know that the only way to test them is with a meter.&nbsp; AGU fuses can fail on the end caps where you can&#039;t see.if you can measure voltage at the amp using the amp terminals for power and ground, you have an amp issue.&nbsp; if you measure no voltage with the amp ground or chassis ground - you have a fuse/power issue.&nbsp; if you measure no or low voltage with the amp terminals, but good voltage with a chassis ground, you have an amp ground issue.&nbsp; make sense?&nbsp; i&#039;m referring to the multi-meter probes and their locations.&nbsp; you want to connect the black multi-meter probe to both the amp ground terminal and bare metal.&nbsp; this will test the amp ground.hopefully, you have fuses on all power wires on both batteries, including between the batteries.&nbsp; check all of them with the meter if you don&#039;t measure&nbsp; voltage at the amp.</blockquote>

[QUOTE="keep_hope_alive, post: 6909936, member: 576029"] you need to use a multi-meter to measure the voltage at the amp terminals, and trace the issue that way. then you'll know you have voltage or ground issues. if you use AGU fuses, know that the only way to test them is with a meter. AGU fuses can fail on the end caps where you can't see. if you can measure voltage at the amp using the amp terminals for power and ground, you have an amp issue. if you measure no voltage with the amp ground or chassis ground - you have a fuse/power issue. if you measure no or low voltage with the amp terminals, but good voltage with a chassis ground, you have an amp ground issue. make sense? i'm referring to the multi-meter probes and their locations. you want to connect the black multi-meter probe to both the amp ground terminal and bare metal. this will test the amp ground. hopefully, you have fuses on all power wires on both batteries, including between the batteries. check all of them with the meter if you don't measure voltage at the amp. [/QUOTE]

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