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To reset the PCM on your Ford F-150, you can start by opening the hood of the truck. Use a socket and ratchet to loosen the lock nut on the negative battery cable connector, then remove the connector from the negative battery terminal. Allow the PCM to discharge its stored electricity for about 20 minutes, which will reset it. Reconnect the negative battery connector to the terminal and tighten the lock nut using the socket and ratchet. This process may assist in troubleshooting PCM-related problems in the vehicle, potentially resolving minor issues that were previously apparent.
Underneath the car hood, remove the negative battery terminal cable. Wait for 20 minutes before reconnecting the cable once the power drain has stopped.