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P0678 Diagnostic Trouble Code Discussion for August 2011

Glow Plug No. 8 Control Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0678
Help Request Posted
2004 Ford F-250 Super Duty King Ranch 6.0L no runability issues VIN: 1FTNW21P84
P0678: Glow Plug 8 Circuit Malfunction. Followed ford trouble tree and all test passed. Swapped gpcm with another off another truck here and still same faults. I found no shorted leads, no open leads but the gpcm has #2& #8 disabled . there is no power going to these two glow plugs out of contro...
August 23, 2011