The harness for it runs under the carpet to the left side of the seat. Check the front-right mounting bracket under the seat, and look at the wiring and loom. You may have a cut wire, especially if they vacuumed under the seat or you had something under there and the seat was moved. It could also be the motor control or switch. You could unplug the connector under the seat and put in another fuse; then you'd know if the issue is in the seat and/or seat wiring or in the wire before connecting to the seat.
If it was me, I'd use a volt/ohmeter to check for a short on the power feed.
Mike - 2005 Stroked/Forged/Cammed V8 (5.0L.); twin-turbos
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