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<blockquote data-quote="adulbrich" data-source="post: 8466260" data-attributes="member: 661255">Got my second Singer high output alternator installed tonight. It&#039;s the 320 amp hairpin off my car.<img src="http://i1028.photobucket.com/albums/y343/aulbrich16/IMG_20160106_180506_758_zpsnqv8st14.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />It&#039;s a 4 pin connector, but only two wires are used. One is a remote turn on and the other is sense going to the positive terminal.It was charging fine around 14.8v-15.0v, then the 320 took a crap and my voltage dropped to 14.6v. Going full tilt at idle, my voltage drop was the same or worse than before.I unplugged the 320 and that didn&#039;t change anything. Then I plugged it back in and unplugged the 370. Immediately my voltage dropped to 12.9v and continued to fall slowly.Obviously, the 370 is working, but the 320 was not. I&#039;m going to do some more troubleshooting tomorrow and go back to the electrical shop that wired up my plug. When they bench tested the 320, it charged at 15.0v. They had taken it apart to look at the regulator. I&#039;m guessing there&#039;s something lose either in the alternator or with my wiring harness. When they replaced the regulator in my 370, they forgot to tighten the positive stud on the inside, and it was really loose. I knew something wasn&#039;t right when I installed it, so I took it back off and they took another look at it, then re-tightened the positive stud on the inside.I don&#039;t know what the deal is with the 320, but I&#039;m hoping it&#039;s something small that is an easy fix. For now, I&#039;ve got it unplugged.</blockquote>

[QUOTE="adulbrich, post: 8466260, member: 661255"] Got my second Singer high output alternator installed tonight. It's the 320 amp hairpin off my car. [IMG]http://i1028.photobucket.com/albums/y343/aulbrich16/IMG_20160106_180506_758_zpsnqv8st14.jpg[/IMG] It's a 4 pin connector, but only two wires are used. One is a remote turn on and the other is sense going to the positive terminal. It was charging fine around 14.8v-15.0v, then the 320 took a crap and my voltage dropped to 14.6v. Going full tilt at idle, my voltage drop was the same or worse than before. I unplugged the 320 and that didn't change anything. Then I plugged it back in and unplugged the 370. Immediately my voltage dropped to 12.9v and continued to fall slowly. Obviously, the 370 is working, but the 320 was not. I'm going to do some more troubleshooting tomorrow and go back to the electrical shop that wired up my plug. When they bench tested the 320, it charged at 15.0v. They had taken it apart to look at the regulator. I'm guessing there's something lose either in the alternator or with my wiring harness. When they replaced the regulator in my 370, they forgot to tighten the positive stud on the inside, and it was really loose. I knew something wasn't right when I installed it, so I took it back off and they took another look at it, then re-tightened the positive stud on the inside. I don't know what the deal is with the 320, but I'm hoping it's something small that is an easy fix. For now, I've got it unplugged. [/QUOTE]

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