Reset a check engine light on 1999 Jeep Grand Cherokee?

To reset the check engine light on a 1999 Jeep Grand Cherokee, you can disconnect the negative battery cable for about 15 minutes. This will clear the vehicle’s computer memory, including the check engine light. Alternatively, you can use an OBD-II scanner to read and clear any stored trouble codes. Make sure to address any underlying issues before resetting the light to prevent it from reactivating.