1991 Ford Mustang GT Q&A

1991 Ford Mustang GT Question: fuel pump

My fuel pump has been bypassed with an on and off switch. all the wires for my 1991 mustang GT are still there it just won't turn the pump by the key. it works fine when i turn the switch on but not by the key. I have checked the relay under the drivers seat but it didn't change anything. In am wondering what else could be keeping the fuel pump from coming by the key. i dont know if there is another relay because all my fuses are fine and the relay under the driver seat. So please help me figuer out this problem. please -
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