1995 Mercury Grand Marquis Reset check engine light?

To reset the check engine light on a 1995 Mercury Grand Marquis, you can disconnect the battery by removing the negative terminal for about 10-15 minutes. This will clear the vehicle's computer and reset the check engine light. Alternatively, you can use an OBD-I scanner to clear the codes. However, it's important to address any underlying issues that caused the light to come on to ensure proper vehicle function.