Does a 1997 ford expedition 5.4 Triton have spark plug wires?

No , the Ford 5.4 liter V8 engine has ALWAYS had the Coil On Plug ( C.O.P. )

ignition system with ( 8 ) individual coils

In a 1997 Ford Expedition , the 4.6 liter V8 engine uses ( 2 ) coil packs and

( 8 ) spark plug wires