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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van SPONSORED BY:

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  #31  
Old 05-12-2013, 03:34 PM
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joshjones.thewelder
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Originally Posted by 69cj View Post
If I remember correctly, put your digital meter on the battery with the engine running and the voltage scale on ac. If a diode is leaking you will read an ac voltage. If not then the diodes are good. You should only read a voltage on the DC scale.
The OP already stated he still has a current draw with the alternator completely disconnected.

Josh
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  #32  
Old 05-12-2013, 03:36 PM
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so I just hook up the digital meter leads on the battery with the engine running, set the meter to AC and if I see voltage then the Diodes are leaking and could be the "smoking gun" were looking for.?

As far as the ignition switch causing problems wouldn't the removal of the fuses going to the Ignition switch keep the switch from sending power to where it shouldn't?

. . . I better get some coffee
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  #33  
Old 05-12-2013, 05:04 PM
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Originally Posted by Bullitt390 View Post
The OP already stated he still has a current draw with the alternator completely disconnected.

Josh


THIS^^^^^^^^

Alternator is likly Good as far as diodes go

But it still could have Low Power Output

If its Unhooked then it wont becausing the Parasitic Drain
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  #34  
Old 05-12-2013, 05:15 PM
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joshjones.thewelder
If you still have parasitic drain with ALL FUSES AND ALL RELAYS disconnected then you move on to disconnecting alternator and starter.

If the issue still exists you then start disconnecting the computers.

If indeed there is a 2 amp draw, which is huge, there must be a power wire grounding out somewhere.

Josh
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  #35  
Old 05-14-2013, 11:34 PM
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I had to go do a little work at the ranch but I'm back now to continue trying to figure out what's wrong here. I went back thru all the fuses and relays and the dome light (DuH!) was causing some draw but I still have .455 amps leaking somewhere. Blade 35 your post mentioned 50 MA is acceptable so it appears I'm still out of range. I had everything obvious disconnected. All fuses,relays, batteries, starter, alt. I guess now I look for anything that does not pass thru the Passenger fuse box and the under hood fuse box. Hmmm I thought everything went thru those 2 fuse boxes (I hate decaf).

Entertaining all possible ideas.

Thanks to all for your help so far.

Can you understand why I nicknamed this truck "Super Duky"
I went and bought another Super Duty this weekend It's a 2008 GAS F250 Lariet 4x4. The 2005 is my first diesel and I got 6.0 voodoo but I'm gonna whip it.
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  #36  
Old 05-15-2013, 12:52 AM
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It was mentioned earlier in this thread but are you closing doors and allowing time for everthing to go to sleep? I traced my drain to the instrument cluster 2 years ago useing the same procedure of removing fuses. I jerry rigged a switch and relay rather than change insturment cluster. As I recall,you can trip the door latch and leave the door open and the system thinks it's closed. Pretty handy while removing fuses beneath steering colum. A wiring diagram would be handy but I was never able to find one. The only unfused circuit(s) that come to mind is aux,#4 and #2 in 7 way trailer plug.
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