03 Durango with 4.7 strange electrical problem - Dodge Durango Forum - Forums and Owners Club!
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Old 07-09-2017, 02:01 AM
03Durango47 03Durango47 is offline
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Default 03 Durango with 4.7 strange electrical problem

Been working on vehicles since the 60's and never had one act like this one. The CEL is on and it throws a bunch of codes. 0700x2 and others. But the really odd one, which may be causing all of them is a low voltage code. Alternator is putting out 15.20v under load and without load 15.40. Vehicle dies when slowing to stop or make turns unless I keep RPM up. But here is the kicker. If I turn the heat on it's perfectly fine! No problem what so ever, and fuel mileage goes up. Did all the basics like checking terminals on battery, alternator and battery checks. All fine. I'm kind of wondering though if it's a PCM issue due to the fact it's fine when I turn the heat on. As soon as you do that RPM's increase and no dieing at stops or turns. AC doesn't work so can't see if that changes anything. But it's too hot to drive with the heat on now 🙄😌
Any other ideas out there? I really cannot afford a PCM and programming 😮

Thanks in advance !
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Old 07-09-2017, 07:00 AM
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Good luck and hope you figure it out. I know many times if you have several codes it's either the PCM or connections/wiring going to it. Have you checked the voltage at the battery to see what's getting there from the alternator (over/under charge)?
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Old 07-09-2017, 10:32 AM
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Jkelly16 ummm, yes, if you read the whole post I state the voltage. ��
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Old 07-09-2017, 12:26 PM
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I assumed you checked it at the alternator based on the way it was worded. If you're getting that much at the battery you may be overcharging, seems high to me but I'm not sure what the spec is.
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Old 07-09-2017, 01:02 PM
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Get the same voltages at both locations. Spec I believe is 13.8 to 16 volts. Anything over 16 would be high.
So the issue is what is causing the low voltage seen by the PCM? Leads me to think it's the PCM at fault. Especially since when I turn the heater on and it runs fine. Never dies or stumbles when stopping or at idle. I do know that the low voltage will cause the issue with throwing codes left and right though. So, I guess it's time to try another PCM. Tried checking the connects and wires and they are fine.
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Old 07-09-2017, 01:27 PM
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Well I now believe it is the PCM. I just looked at it again, then stuck my phone down in there and took a pic of it and it's a remanufactured PCM. That could explain things😉
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