Where is the electric shift control module for transfer case on an 2001 ford ranger?

The 2001 Ford Ranger's electric shift control module for the transfer case isn't a single, easily identifiable module like an ECU. The control is integrated into the electronic control unit (ECU) or Powertrain Control Module (PCM). There's no separate "transfer case control module."

The PCM receives input from various sensors (including the transfer case position sensor) and uses this information to control the shift solenoids within the transfer case itself. Therefore, you won't find a separate module labeled as such; any troubleshooting will involve diagnosing the PCM, its related wiring harness, and the solenoids inside the transfer case. The PCM is typically located under the hood, often near the firewall.