My 2006 Ford Fusion SE V6 wont start the lights n radio come on but engine wont

Hello, This is very common with a weak battery, battery terminal or battery cable corrosion, or even a weak alternator. Checking for corrosion on the battery terminals is easy, and there is a step by step guide to cleaning the terminals here on repairpal.com. Consider doing this before seeking help, and make sure that you follow the how-to guidance for jumpstarting a battery when you are finished. If that does not solve the problem, you will need a starting and charging system test ran, which is automated, quick, and economical. You can also drop the battery off for charging and testing at many auto parts stores, most times free of charge.