How do you reset the PCM on a Ford?
How do you reset the PCM on a Ford? Open the hood of the Ford. Loosen the lock nut located on the negative battery cable connector with a socket and ratchet. Pull the connector off the negative battery terminal. Wait for 20 minutes while the PCM bleeds off the electricity it stores for backup power. Once the power drains from the PCM, it resets. What happens when you reset the computer in a car? Sometimes people think that if you reset the computer, or electronic control module, in your car, it will fix the problems that your engine light is...