02 F350 Charging Problem - Ford Powerstroke Diesel Forum
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post #1 of 19 Old 02-28-2008, 08:31 PM Thread Starter
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02 F350 Charging Problem

My 7.3ltr PS decided to stop charging, and I can't figure out why I replaced both batteries and both alternators and to no avail it still is not charging I have checked all the fuses and they all check out ok. I don't know what else to do does anyone have any ideas of what is going on anyone anyone at all? I need help!! F350Dave.
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post #2 of 19 Old 02-28-2008, 08:40 PM
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Are you sure you don't have voltage coming out of the alternators or are your batteries going dead on you overnight?
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post #3 of 19 Old 02-28-2008, 08:54 PM
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What do you mean by not charging exactly? Are you putting a meter to it or going by the gauge in the dash?

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post #4 of 19 Old 02-28-2008, 09:03 PM Thread Starter
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I have put a volt meter to the back of the alternator and am only getting what volts I have in the batteries I should be getting around 13.5 to 14.4 volts and I am only getting about 12.3 and no change when the rps are increased.
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post #5 of 19 Old 02-28-2008, 09:13 PM
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Did you check both alternators? I believe and I might be wrong but the pcm controls the alternators on a 2 alternator system and 1 might not be putting out any volts while the other is.

2002 F-250 4x4 EC, SRW, SB
Auto 93,000 miles
DP Tuner F5
ATS Compressor and 1.0 Exhaust housing high flow back plate
Turbo Back 4" Silverline Exhaust Mbrp Muffler Delete
Isspro Trans,Pyro,Boost Triple Pod
Fumoto Oil Drain Valve
AIH Delete With Boost Fitting


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post #6 of 19 Old 02-28-2008, 09:26 PM Thread Starter
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I have checked them both and they both read the same
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post #7 of 19 Old 02-28-2008, 09:30 PM
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Hmm check the wiring to the pcm and make sure its okay. Do you have a scanner for reading codes? Im guess since the pcm controlls the 2 alt system you would get a code. I will ask marc to check this out he will be able to give you some good advice

2002 F-250 4x4 EC, SRW, SB
Auto 93,000 miles
DP Tuner F5
ATS Compressor and 1.0 Exhaust housing high flow back plate
Turbo Back 4" Silverline Exhaust Mbrp Muffler Delete
Isspro Trans,Pyro,Boost Triple Pod
Fumoto Oil Drain Valve
AIH Delete With Boost Fitting


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post #8 of 19 Old 02-28-2008, 09:40 PM
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Looks like Marc logged out for the night sorry bud. I will make sure to bump this thread up tomorrow so one of the techs see's it

2002 F-250 4x4 EC, SRW, SB
Auto 93,000 miles
DP Tuner F5
ATS Compressor and 1.0 Exhaust housing high flow back plate
Turbo Back 4" Silverline Exhaust Mbrp Muffler Delete
Isspro Trans,Pyro,Boost Triple Pod
Fumoto Oil Drain Valve
AIH Delete With Boost Fitting


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post #9 of 19 Old 02-28-2008, 09:44 PM
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are you sure there are no wires broken....one wire controlls the stator on the alt......that tells it to come on or turn off....

are you positive the fuses are OK??

are you positive the wiring at the alt is OK??
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post #10 of 19 Old 02-28-2008, 10:20 PM Thread Starter
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I checked the wires to the pcm and they all looked ok. I do have a scanner and threw an P1105 Dual Alternator Upper Fault (Monitor). Marc- I have checked the wires and cant find anything that looks wrong, as for the fuses , I checked all the fuses in the cab and they are all fine, there are three under the hood on the drivers side but they look like relays rather than fuses. As for the wires to the alt. I have unpluged the stator plug and tested it, when off line the alt. does nothing, and when plugged in the alt. gets EXTREMELY HOT almost like there is alot of resistance if I unplug the top alt. the bottom one gets hot and vis versa, the only thing that I am sure of is that I'm not sure what is wrong.
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