new battery drove for three weeks now wont start starter makes clicking noise

Hello, Have the battery tested, and check the alternator output. It sounds like you have a weak alternator, bad battery, or bad battery cables/terminals. Either inspect the system, or have a starting and charging system test performed. Let me know if you have other questions, otherwise, here is a list of certified shops for your convenience. http://repairpal.com/jeep-within-10-miles-of-walnut-creek-california-94598