Question about 2002 Ford F350 Super Duty DRW Reg. Cab

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2002 F350 7.3l wont start properly during cold weather-after doing voltage checks appears that the grounding circuit for the glow plug relay may have a bad connection-does this wire go straight to ground or to control module ?-when key initally turned on plugs not working but lite is on-bump the motor over with starter then the plugs start to work-any ideas

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  • pete_patton Mar 13, 2009

    thanks-will check it out -figured it should be straight to ground

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Most likely a loose ground connection, should connect straight to ground hope this helps.

Posted on Mar 09, 2009

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2006 chevy silverado duramax hd 4WD has codes u1016 /c0035/co201/po673/675/677 but runs great


DTC P0671: Cylinder #1 Glow Plug Control Circuit
DTC P0672: Cylinder #2 Glow Plug Control Circuit
DTC P0673: Cylinder #3 Glow Plug Control Circuit
DTC P0674: Cylinder #4 Glow Plug Control Circuit
DTC P0675: Cylinder #5 Glow Plug Control Circuit
DTC P0676: Cylinder #6 Glow Plug Control Circuit
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DTC P0678: Cylinder #8 Glow Plug Control Circuit

Circuit/System Description
The glow plug controller has the ability to perform internal checks, an open or a short to ground on each of the glow plug circuits. If the glow plug controller senses a problem in a glow plug circuit, the glow plug on the affected cylinder will be disabled and the glow plug controller will send an error message to the engine control module (ECM). If this condition exists, the DTC will set.
Conditions for Setting the DTC
The glow plug controller detects that the glow plug control circuit is open, shorted to ground, or has more than 1 ohm of resistance.

Circuit/System Verification
Verify that DTC P064C is not set.
If DTC P064C is set, refer to DTC P064C.
Ignition ON, engine OFF, observe the scan tool Glow Plug 1-Glow Plug 8 parameters. All 8 Glow Plug parameters should closely match each other.
Refer to Testing for Intermittent Conditions and Poor Connections if you cannot duplicate the conditions.
Engine running, observe the DTC information with a scan tool. DTCs P0671-P0678 should not set.
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

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Hope this helps (remember to rate this answer).

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