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IOD/OBDII

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Hey guys, I've had this issue since I bought the truck, but the IOD fuse keeps blowing and I don't know why. I do know that this fuse runs the OBDII port and several lights. I have checked all of the light connections and nothing seems to be shorting out. Can anyone throw out some more advice on why this fuse would be blowing?

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The IOD covers a lot of stuff in the cab. I would get the FSM from the downloads section and start chasing wires.  

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So one of these is shorted or grounded out? Thanks for the diagram. I will try and trace these wires to see if I can find my issue.

  • 3 weeks later...
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Does anyone know where everything plugs into the junction block? For example, if an interior light was shorting, could I unplug it directly from the junction block to resolve my issue? If so, does anyone know what the pins are for everything?

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