Not charging batteries after battery replacement - Page 3 - Ford Powerstroke Diesel Forum
6.7 Electronics Discussion (2011-2016) 6.7 Electronics Discussion

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post #21 of 21 Old 08-12-2019, 10:26 AM
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We have this issue on our fleet trucks there is a break in the purple wire on alternator take and run a jumper to battery box on pass side, this will prevent you from replacing whole harness. Typical symptoms are overcharging which makes bcm shut down to protect itself and just a nagging battery light even though its charging when you check batteries
Also take a set of jumper cables and go from battery to battery if this removes the light the wiring harness between batteries has loosened at a splice
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Last edited by Woodsgew; 08-12-2019 at 10:29 AM. Reason: Adding info w/o double let posting
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