P1633-TCM Internal - Test External Watchdog Performance: Notes
WARNING: This page is about a different car, the 2016 Dodge Charger and 2015 Dodge Charger. However, it is still accessible from the selected car via links, so may be relevant.
For a complete wiring diagram refer to appropriate SYSTEM WIRING DIAGRAMS article
Fig 1: TCM CAN C, Fused Ignition Switch, Ground, & Transmission Control Output Circuit Diagram