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Discussion Starter #1
New member here.
Done a search for anything related.
Fuel sensor fail.
P0463
New sending unit new tipm new pcm
Will not get power at the tipm fuse for the lift pump.
I have checked the wiring all the way down the truck, from the bottom of the tipm to the connectors at the driver side kick panel and even down the frame rail.
Installed new tipm after sending unit.
Installed new pcm, flashed it with my efi live and got vin and all sorted.
I can apply power to either side of the fuse in tipm and lift pump comes on and truck runs good.
Assuming I have a wiring issue inside the truck or from tipm to pcm but split the harness open and no broke wires or frays?
All fuses are good. Relays all test good. Tried 3 different tipm to be sure.
 

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You’re going to have to perform Voltage and continuity tests. You’ll need a wiring diagram. I got mine from Alldata.
 
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