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Discussion Starter · #1 ·
i have a 99 cummins and i have a random check engine light come on but cannot have it flashed because there is no power to the port. the cig fuse is good but the bottom port does not work top one does. can someone please help me get it fixed so i can buy a programmer for my truck
 

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I suppose I would start with tracing the wires, look for a place for them to be broken, burned, or disconnected. I'm not sure how else I could help but this would be the first step I would take.
 

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Check the fuse in the fuse box on the drivers side. Not the cigarette fuse the other fuses.

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Check the fuse that has protective cover on it can't remember #.
 
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