Put the car in park and turn it off. Don’t forget to remove the keys. While still in the driver’s seat, reach under the instrument panel–on your left side–and pull the hood release.
Go to the front of your Plymouth Neon and locate the auxiliary release, which is in the center of the hood. Pull it or twist it to open the hood fully. Locate the prop rod–usually on the engine compartment edge–and use it to securely prop the hood open.
Locate the windshield washer reservoir. In the Plymouth Neon, it’s in the engine compartment on the passenger side’s inner fender.
Disconnect the negative cable on the battery. If your car comes with air bags, wait at least 90 seconds after disconnecting the battery cable before continuing.