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Old May 10, 2016 | 10:32 AM
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Need help 2000 7.3 diesel

I have a 2000 Ford F-350 7.3 and I can't get rid of an error code po683. I have changed the Gpcm and the solenoid. I have checked the wire harness and had a burnt out plug that went to the glow plugs and replaced that. Now I am lost. I can't smog my truck. Had to be smoked in March now it's may. Can someone please help!!!!
 
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Old May 10, 2016 | 01:27 PM
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were the codes cleared?
 
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Old May 10, 2016 | 01:52 PM
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Originally Posted by empiretc
were the codes cleared?
Yes there were cleared
 
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Old May 10, 2016 | 02:05 PM
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you definitely need to double check the wires.

take a MM and tone them out to make sure none are broken.
 
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Old May 10, 2016 | 02:49 PM
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Originally Posted by empiretc
you definitely need to double check the wires.

take a MM and tone them out to make sure none are broken.
Ok I will do that again. Could it be a sensor gone bad or the fuse relay
 
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Old May 11, 2016 | 04:09 PM
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Originally Posted by Mikeronalds
Ok I will do that again. Could it be a sensor gone bad or the fuse relay
How do I tone the line?
 
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Old May 11, 2016 | 04:45 PM
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Tone the line, another term for ohm them out with multi meter
 
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Old May 11, 2016 | 05:09 PM
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Originally Posted by Mikeronalds
I have checked the wire harness and had a burnt out plug that went to the glow plugs and replaced that.
What does the other side of the connector look like where the burnt pin was?
 
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Old May 11, 2016 | 05:41 PM
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Originally Posted by AllaboutMPG
What does the other side of the connector look like where the burnt pin was?
The gasket was fried so that is what I replaced. The connector was burnt so I cleaned that up. I toned it and it was running all the way thru. What ohms should I get on it.
 
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Old May 11, 2016 | 05:53 PM
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Originally Posted by Mikeronalds
The gasket was fried so that is what I replaced. The connector was burnt so I cleaned that up. I toned it and it was running all the way thru. What ohms should I get on it.
Are you talking about the valve cover gasket? The P0683 code is a PCM to GPCM communication error not a glow plug code, IIRC.
 
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Old May 11, 2016 | 06:08 PM
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Looking at the connector the order of pins is
GGIICIIGG
G - Glow Plug
I - Injector +
C - Injector -
Ohms between the G and block Ground should be 0.1 - 2.0 ohms. Anything more than 2 ohms indicates a problem.

Looks like you could use the wire diagram in the following link and check them all the way from the GPCM to the plug to look for a problem with the wires

http://www.thedieselstop.com/faq/949...les/032136.pdf
 
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Old May 11, 2016 | 06:11 PM
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Originally Posted by Pikachu
Are you talking about the valve cover gasket? The P0683 code is a PCM to GPCM communication error not a glow plug code, IIRC.
Again Pikachu appears to be right

Look at the bottom of page 3 of this link for testing procedures

https://b7445ba3-a-62cb3a1a-s-sites....attredirects=0
 
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Old May 11, 2016 | 09:14 PM
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Originally Posted by AllaboutMPG
Again Pikachu appears to be right

Look at the bottom of page 3 of this link for testing procedures

https://b7445ba3-a-62cb3a1a-s-sites....attredirects=0
Yes the valve cover gasket was fried.
 
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Old May 11, 2016 | 09:34 PM
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Originally Posted by Mikeronalds
Yes the valve cover gasket was fried.
Do I have to unplug the pcm also?to test the line
 
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Old May 11, 2016 | 09:56 PM
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The instructions in QB12 say to have the PCM disconnected. I would start by using the wiring diagram in the first link I posted and check for broken / damaged wires. If none found then use the second link I posted and check for voltages.
 
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