Use this plug:

• The diagnostic port is near your left knee when you sit on the driver's seat. Turn ignition on.
• Connect the Tacho Universal to Chrysler diagnostic plug and the diagnostic port. Use the connector CCD.
• Select the menu Chrysler-Chrysler99 Diagnosis.
• The Tacho Universal shows you the old value.
• Enter the new value.
• Verify the new value with OK.

Note: If the new value is not displayed, you have to disconnect the battery for about 2 minutes.