1999 Ford Mustang GT power seat is not working

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1999 FORD FIVE HUNDRED
V8
2WD
AUTOMATIC
95,000 MILES

1999 Ford Mustang GT mileage: 95,000. Neither the power seat nor lumbar support work. I checked for blown fuses under the dash. Nothing is blown. I did find fuse 13 is grounded on both sides. I checked the fuse block under the hood. Fuse 1, 30 amps is blown. It instantly blows when replaced with ignition on or off. There are no markings on either block telling what each fuse is for. I bought a Haynes manual. It has some diagrams, but none for power seats.

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Your lumbar support is controlled by a small electric air pump. Try disconnecting the wires to the pump and see if the fuse still blows. If it does not blow, you have a faulty motor for the lumbar support. If it does blow then you have a short in the wiring somewhere for the switch.