P0620 - Generator Control Circut - TheDieselGarage.com
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Old 01-19-2010, 11:21 PM   #1
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P0620 - Generator Control Circut

Has anyone had this problem yet? Headlights dim then get bright, dash lights shut on & off, radio shuts off and/or changes inputs. I'm also getting a alternator high voltage code.
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Old 01-20-2010, 02:27 AM   #2
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nope
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Old 01-20-2010, 07:42 PM   #3
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Sounds like your control module on the alternator is on the fritz. This happened on my old fox-box
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Old 01-22-2010, 10:08 PM   #4
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Just got it back from the dealer, one corroded connection on the lower alternater wiring harness caused all of this. I would of thought that the second alternater would of picked up the load and I wouldn't of had any of these problems.
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Old 01-26-2010, 04:17 PM   #5
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interesting. are they both run through the same harness/wiring? or are they independent?
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