An old trick is to try spraying WD40 on the connections after cleaning them. corrosion can interfere with conductivity. also check for a fuel pump relay under the hood and look at the numbers on it. there should be relays for other thing that match. temporarily switch them is that works then you need a new relay. or trace the wires all the way back. some vehicles have another connector on the harness. check that and or splice into it and run new wires to the back.
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An old trick is to try spraying WD40 on the connections after cleaning them. corrosion can interfere with conductivity. also check for a fuel pump relay under the hood and look at the numbers on it. there should be relays for other thing that match. temporarily switch them is that works then you need a new relay. or trace the wires all the way back. some vehicles have another connector on the harness. check that and or splice into it and run new wires to the back.