How do you install ecm in 2.9 bronco 2?

To install the Engine Control Module (ECM) in a 1990-1996 Ford Bronco II, first disconnect the negative battery terminal for safety. Locate the ECM, typically found under the dashboard on the driver's side or behind the glove box. Remove the mounting screws and carefully unplug the wiring harnesses from the ECM. Install the new ECM by connecting the wiring harnesses, securing it with screws, and then reconnecting the battery terminal.