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Before you buy another AFM, isolate your test to the fuel pump switch within the AFM. Make sure that you have no continuity between the first and second terminals (E1 and Fc) with the AFM door fully closed, and full continuity (zero resistance) between them as soon as the AFM door is opened slightly. If this checks out OK, don't replace the AFM just yet. Test it, test the circuit opening relay, try the jumper, etc.
Good luck man!
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