Re: 2008 no start
Can you communicate with the fpcm with the tech 2? Do you have air suspension, if so can you communicate with the air suspension module? The air susp module is the last module in the high speed lan circuit before the terminating resistor, if you can communicate with it likely you have a fault with the fpcm itself, or its ground or power. If you cannot communicate with the air suspension module you need to test the high speed lan circuits for a short or open, still could be a fault in the fpcm. Try to scan all modules in the truck and see what, if any, you have no communication with. From there i may be able to help a little more.
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