Q: Wire for Check Engine Light was cut

The check engine light bulb should have one 12 volt hot wire that is run in parallel to other bulb lights. You can check for battery voltage between that wire (if you believe you have identified it) and ground. The other wire to the bulb that completes the circuit may be pink/light green and that wire is a ground wire that is coming from a terminal on the PCM. That wire from the PCM is the switched segment of the circuit that allows the bulb to turn on and off. It is possible the ground wire was cut at the PCM. To resolve this you need to refer to the exact wiring configuration as published in the factory service manual. If you want the required steps performed by a certified Mechanic, dispatched by YourMechanic right to your location, please request an electrical circuit diagnostic and the responding certified mechanic, who will have the factory wiring diagram in hand, will get this problem resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.