APP (TPS) and IVS sensor location diagram with numbered callouts…

'94.5-97 PowerStroke 7.3L DI Turbo Diesel Accelerator Pedal Position (APP) sensor & Idle Validation Switch (IVS) Pedal Assembly F6TZ9F836AA or on Amazon
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1 - Takeout from main wiring harness
2 - Accelerator Pedal Position sensor
3 - Connector for APP
4 - Accelerator pedal assembly
5 - Idle Validation Switch
6 - Connector for IVS

The IVS should be closed (less than 5 Ohms, short circuit, ON) when the pedal is released, and open (greater than 10K Ohms, OFF) at any other pedal position.
The APP is tested as this page describes:

Part of 1992-1997 Ford F-250 Wiring Diagrams

Owner caption May 2020 · Photo 82 of 195